As with the House, the new Colorado Senate map was approved by the Commission Monday on a 9-2 vote (2 of 5 Republicans voting no). The final maps that were approved were the "Compromise" maps produced by unaffiliated Chairman Mario Carrera.
Once again, Carrera's stated goal was to produce as many competitive districts as possible and increasing the number of Hispanic influence districts (30% or more). He seems to have achieved both, as his map has more competitive and more Hispanic districts than either the Democratic or Republican maps did.
Here is what the new Senate map submitted to the Colorado Supreme Court for Approval looks like:
Just a reminder, the percentages are the Bennet v. Buck numbers as this was the most even race the state has had in recent memory and should be the Democratic baseline for the near future, in some cases down ballot registration numbers play a bigger role, but it should at least illustrate the shifts in the districts. New numbers first, old numbers in parentheses. I tried to track the district number changes, but some will change back to their original number as staff was instructed at the end to keep district numbers for any incumbent that isn't in the same district as another incumbent.
Eastern Plains/San Luis Valley:


SD1 - Brophy (R) - 28%-65% (29%-65%) The Eastern Plains district. Blood red, end of story.
SD4 - Grantham (R) - 45%-49% (31%-64%) Formerly SD2, this district was transformed from a south-east Colorado seat that included Republican-heavy Fremont County to a south-east and San Luis Valley district that took Fremont out. The result is a district that is 36% Hispanic and now only leaning Republican instead of overwhelmingly so.
Pueblo:

SD3 - Giron (D) - 56%-39% (56%-39%) Same as before, Pueblo and Pueblo West, 44% Hispanic, safe Democratic.
Western Slope:

SD5 - Schwartz (D) - 49%-45% (49%-45%) This district loses the San Luis Valley and picks up Dem-leaning Eagle County, it all seems to even out, however, as the percentages stay the same.
SD6 - Roberts (R) - 42%-52% (42%-52%) South-west district, virtually unchanged, home of Senator Ellen Roberts, one of the few moderates left in the Colorado Republican Party.
SD7 - S. King (R) - 32%-60% (32%-60%) Mesa County. period.
SD8 - White (R) - 46%-47% (47%-47%) This district exchanged Eagle for Summit, shrinking some for growth in other counties, just a tick redder and home to Senator Jean White, my other favorite Republican.
El Paso County:

SD2 - OPEN - 29%-64% (n/a) This new seat basically takes in all of the old SD4 minus Douglas County because of growth and it's El Paso portion comes from the south and west to take in all the left overs. Solid Republican.
SD9 - Lambert (R!) - 28%-68% (29%-66%) The most Republican Senate district, taking in the Air Force Base, Monument, and the rest of greater Jesus land!
SD10 - Cadman (R) - 33%-61% (30%-63%) This district shrinks to become the Cimarron Hills and east Colorado Springs district. Still Republican.
SD11 - Morse (D) - 52%-41% (50%-42%) The Democratic stronghold in El Paso County, this district takes in almost every Democratic precinct there is. The Commission's local Republican member Bob Loevy agreed that Dems deserve one seat, and this is it!
SD12 - K. King (R) - 37%-57% (38%-56%) This south-west/north-west Springs and Fountain district stays pretty close to the same, losing it's extremities. Solid R.
Weld County/Broomfield:

SD13 - Renfroe (Biggot.. er.. R) - 40%-54% (37%-58%) This district changes for population growth, reaching south instead of north, containing all of Greeley and the towns directly south not taken in by SD23, 38% Hispanic now, but still out of reach for Democrats.
SD23 - Mitchell (R) - 41%-53% (43%-51%) This district needed to grow and does so unfortunately, but reaching further north and taking in all of Windsor and Johnstown and Timnath, all Republican areas added, making this district even more Republican.
Larimer County:

SD14 - OPEN (D) - 56%-38% (57%-38%) The Fort Collins district. Definitely Democratic.
SD15 - Lundberg (R) - 42%-51% (41%-52%) The rest of Larimer County district, including Loveland and Berthoud. Solidly Republican.
Boulder County:

SD17 - OPEN (D) - 58%-37% (58%-37%) This Longmont-to-Louisville district is about the same, and just as Democratic.
SD18 - Heath (D) - 76%-20% (77%-19%) Now reaching west to take in the rest of Boulder County, this district is as safe as ever for the Senator from the People's Republic.
Jefferson County:

SD16 - Nicholson (D) - 51%-31% (53%-42%) This district went through drastic changes, once including Grand, Summit, Clear Creek, Gilpin and most of the foothills region in Jeffco, this district has been sliced up and now makes up for the loss of one of the Jeffoc seats, going right into Golden and Lakewood, and not picking up much of the foothills population. Clear Creek and Gilpin remain in this district, keeping Jeanne Nicholson's home, and then Superior is brought in from Boulder County. The percentages have put this district into tossup territory, but it actually looks safer to me given the parts of Jeffco now in this district and the loss of Grand County.
SD19 - Hudak (D) - 48%-45% (48%-46%) Unfortunately this district changed little, Democrats tried a couple different ways to shore up Evie Hudak, but Carrera was having none of it, it remains Westminster/Arvada and a pure tossup seat for an incumbent who barely won in 2008, not ideal to say the least.
SD20 - Jahn (D) - 53%-41% (53%-40%) After getting a major make over to cover the loss of one Jeffco seat, this district loses Golden and Applewood (home to it's former incumbent, Ed Perlmutter) and becomes a Wheat Ridge/east Lakewood district. This district still manages to keep it's Democratic lean.
SD21 - Kopp (R) - 43%-51% (43%-52%) Formerly SD22, home to the Senate Minority leader, this district is safe as ever for Republicans, taking in all the most Republican parts of the county.
Adams County:

SD22 - OPEN - 55%-36% (n/a) This new district is Hispanic Majority and based in Commerce City, definitely safe for Democrats and makes up for the loss of one of our Jeffco seats.
SD24 - Tochtrop (D) - 49%-45% (51%-41%) This seat moves a bit to the right with the loss of territory to the new SD22, still Thornton-based, it will be one to watch in 2014 when it's up.
SD25 - Hodge (D) - 47%-45% (47%-45%) This district is the same, definitely swingy and luckily Mary Hodge is the incumbent, this district is 37% Hispanic, making it one of the Hispanic influence districts.
Arapahoe County:

SD26 - Newell (D) - 49%-46% (48%-47%) Here's where we did get just a little help, the left overs from Denver after losing it's 5th seat needed to go somewhere so the Tech Center portion goes into this district. It also loses most of Centennial while picking up Greenwood Village, still a tossup, but this race came down to a handful of votes in 2008 so every little bit helps.
SD27 - Spence (R) - 43%-52% (44%-51%) Still the rest-of-Arapahoe district, it remains Republican, in fact just a tick more so.
SD28 - OPEN (D) - 53%-41% (54%-40%) south Aurora, Democratic-leaning.
SD29 - Carroll (D) - 58%-36% (60%-33%) At just 37% White, this north Aurora district is safe.
Douglas County:

SD30 - Harvey (R) - 38%-58% (38%-58%) Highlands Ranch, Lone Tree and some extras, safe for Steve "I make every decision based on the Bible" Harvey.
SD31 - Scheffel (R) - 33%-66% (31%-64%) This seat is now just the rest of Douglas County, home to Mark Scheffel, who is more than safe.
Denver:

SD32 - Aguilar (D) - 62%-33% (65%-31%) This district now looks less weird than before, taking in south and south-west Denver, 30% Hispanic, safe D.
SD33 - Johnston (D) - 82%-15% (81%-15%) As close to even racially as it gets with 34% White, 33% Hispanic, 28% Black, politically it's the most lopsided in the State.
SD34 - Guzman (D) - 76%-19% (76%-18%) This north-west Denver and Hispanic Majority district now takes in Downtown and Uptown, safe Democratic though.
SD35 - Steadman (D) - 71%-24% (64%-32%) This district now takes in Cap Hill, Cheesman, and Speer areas of the old SD31, including Pat Steadman's home. Joyce Foster has chosen to not seek re-election rather than run against Steadman in the Primary (YES!!).
So here's the totals:
Old Map:
Solid D: 10 (55%+)
Lean D: 4 (54%-52%)
Tossup: 7 (51%-47%)
Lean R: 1(46%-44%)
Solid R: 13 (43%-)
Final Map:
Solid D: 10
Lean D: 3
Tossup: 6
Lean R: 2
Solid R: 14
Democratic Seats (old map)
Solid D: 10
Lean D: 4
Tossup: 6
Lean R: 0
Solid R: 0
Total: 20
At first glance it's hard to see how this map was drawn mostly by Democrats, but a lot of the more unfortunate changes were strictly due population growth, Denver lost out and Douglas County gained. State Senate district do tend to be more stable in their partisan performance given their size, however, so a 51% Bennet Senate district is safer than a 51% Bennet House district. We have a decent chance of holding all the tossups, and at least one of the lean R seats is in play, the other we can forget about until Jean White is termed out. The Colorado Senate is definitely in play under this map though, so Democrats can't take anything for granted.
11:50 PM PT: Since there is a question of what seats are up next year and which ones are up in 2014, here it is:
2012: SD2 (Open), SD8 (White), SD10 (Cadman), SD12 (King, K.), SD14 (Open D), SD17 (Open D), SD18 (Heath), SD19 (Hudak), SD22 (Open), SD23 (Open R), SD25 (Hodge), SD26 (Newell), SD27 (Open R), SD28 (Open D), SD29 (Carroll), SD31 (Scheffel), SD35 (Steadman)
2014: SD1 (Open R), SD4 (Grantham), SD3 (Giron), SD5 (Open D), SD6 (Roberts), SD7 (King, S.), SD9 (Lambert), SD11 (Open D), SD13 (Open R), SD15 (Open R), SD16 (Nicholson), SD20 (Jahn), SD21 (Open R), SD24 (Open D), SD30 (Open R), SD32 (Aguilar), SD33 (Johnston? Open?), SD34 (Guzman)