Many of the hardcore Deaniacs, including myself, are planning to vote for the Governor anyway. Governor Dean has said that he is looking for "progressive delegates" to go to Boston for him.
How likely is it that he'd get delegates? For answers, we look to the late 2000 primaries.
By March 14, both parties had selected presumptive nominees, Bush and Gore, with majorities or near-majorities of the available delegates. We'll look at the primary results starting in April, and see what we find. All vote totals gathered from Dave Leip's US Elections Atlas.
Democrats:
April 1, Virgin Islands: No results available.
April 4, Kansas: No results available.
Pennsylvania: Gore 75%, Bradley 21% (Gore 118, Bradley 33)
Wisconsin: Gore 89%, Bradley 9% (Gore 72)
April 15, Virginia: No results available.
April 22, Alaska: No results available.
May 2, DC: No results available.
Indiana: Gore 75%, Bradley 22% (Gore 52, Bradley 15)
North Carolina: Gore 70%, Bradley 18% (Gore 71, Bradley 19)
May 9, Nebraska: Gore 70%, Bradley 27% (Gore 17, Bradley 7)
West Virginia: Gore 72%, Bradley 18% (Gore 22, Bradley 6)
May 16, Oregon: Gore 85%, LaRouche 11% (Gore 46)
May 23, Arkansas: Gore 78%, LaRouche 22% (!) (Gore 28, LaRouche 8)
Kentucky: Gore 71%, Bradley 14.7% (Gore 49)
June 6, Alabama: Gore 77%, Uncommitted 17% (Gore 44, Uncommitted 10)
Montana: Gore 78%, Uncommitted 22% (Gore 12, Uncommitted 3)
New Jersey: Gore 95%, LaRouche 5% (Gore 107)
New Mexico: Gore 75%, Bradley 21% (Gore 17, Bradley 5)
South Dakota: No results available.
Totals: Gore 675, others 106.
Between these and the GOP results, Dean could conceivably double his current delegate haul in late states with no further campaigning. However, this would require his name to be on the ballot in all the future states, and the presence of the Edwards/ Kerry loser (if any) would reduce his vote; if that winner hasn't been determined, that would likely reduce it further.