I know the NCAA has frozen Division II-Division I upgrades until 2011 (everybody currently undergoing a move up is allowed to continue), but Division II might prove the most fertile ground.
Sadly, it's probably going to take an externally induced raid on the Missouri Valley to free up enough slots, i.e.:
MVC West - Denver, Colorado College, Regis, Wichita State, Oral Roberts, Oklahoma City
MVC East - Creighton, Drake, Northern Iowa, Southwest Baptist, Evansville, Bradley
Indiana State, Illinois State, Southern Illinois, and Missouri State are presumed to have been lured away in the fallout of realignment in the Big East, Atlantic 10, and any additions to the Bowl Subdivision.