According to the National Association of College Admissions Counseling (NACAC) "Space Availability Survey" released today, there are currently 226 four-year colleges who have room for freshmen and will still accept applications for fall 2010 admission (240 have room for transfers). Almost all of them also still have housing and financial aid to give.
If you still need a college to attend next fall, this is good news.
The survey is here. Thanks to Allison for finding it approximately two-and-a-half seconds after it was released.