Despite there being a little under 250 superdelegates left to declare support (and under 200 if you don't count add-ons), almost all states/territories still have undeclared superdelegates. The undeclared supers are oddly spread out over all contests. As of 11:00 AM Pacific time today (per DemConWatch), there were 10 states with 1 super left, 43 with more than 1 super, and 2 with no supers (Nebraska and American Samoa).
With the endorsement of the last Idaho superdelegate today, Idaho joins Nebraska and American Samoa as the only states/territories with no undeclared supers.
Both Idaho and Nebraska still have yet to select their add-on delegate, so technically the convention delegation is not complete. American Samoa is the only truly complete convention delegation. But ID and NE add-ons do not get selected until June 14 and 21 respectively, so all the existing supers have endorsed.
If you look at the distribution of remaining supers across states/territories, there are 110.5 in states Obama has/will win and 78.5 in states Clinton has/will win (splitting the next 6 WV,KY,PR to Clinton and OR,MT,SD to Obama). That's 59% to 41%. If you just look at elected superdelegates and past leaders, Obama trails by a little bit 43.5 to 37.5 (54% to 46%). In DNC superdelegates, he has a huge lead at 73-35 (68% to 32%). I suspect he has a lot of DNC delegates ready to role out.
States with 6 or more supers left to declare include: CA (18), CO (6), LA (6), MD (9), MA (6), MT (6), NC (7), OH (8), OR (7), TN (6), TX (7), WA (6), WV (6). The vast majority of the other states/territories have 3 or less.
Here's the whole breakdown of remaining supers by contest (not counting the 7 undeclared add-ons, and combining elected and DNC members).
AK 2
AL 3
AR 1
AZ 2
CA 18
CO 6
CT 2
DC 4
DE 4
GA 3
HI 2
ID -
IL 3
IN 3
IA 2
KS 4
KY 3
LA 6
ME 3
MD 9
MA 6
MN 1
MS 3
MT 6
MO 5
NE -
NH 2
NJ 3
NC 7
NM 1
NY 3
NV 3
OH 8
OK 4
OR 7
PA 4
RI 1
SC 3
SD 1
TN 6
TX 7
UT 2
VA 5
VT 1
WA 6
WI 4
WV 6
WY 2
Gu 3
DemAb 1
PR 1
VI 1
Obviously this list will probably be out of date by the time it is posted and read (example... I had to update Akaka as I wrote). I think a few of them have to remain undeclared because of their position (e.g. DNC board and people like Reid, Pelosi, Dean), but we should hear from the rest soon.
We should also be able to cross off more states soon as done. Now 9 states have only 1 superdelegate left that is not an add-on (AR, MN, NM, RI, SD, VT, DemsAbroad, PR, VI). AR and NM have already selected their add-on delegates, so when the last super commits their entire delegation will be complete. DemsAbroad and VI don't have add-ons, so they will also be complete.