Googler, JohnMu, wrote in a Google Groups thread that links from EDU domains are not in itself better links than .com or .net links. John said:

In general, I would like to add that no, backlinks from .EDU domains generally do not get “additional credibility from Google“

I believe this may be one of the first times we have official confirmation in writing from a Google representative that EDU links are not anymore valuable then other types of links.