Katz' notes:
Boston brought back Marquette's Jimmy Butler for a second workout within a week, putting Butler in the mix at No. 25. The Celtics are also considering Jeremy Tyler, who played in Israel and Japan recently, among other places. Cleveland State's Norris Cole also has been tabbed as a favorite among some circles in the organization. Cole has interest in teams like Sacramento if the Kings don't get a point guard in the lottery.
http://espn.go.com/blog/truehoop/category/_/name/draft-reports
Butler's story is pretty incredible. He sounds like a great kid: the kind you want to see good things happen to, because he's worked for everything he's gotten. I don't know if I would pass on some others with more upside/size to take him at #25, but I wouldn't be too angry with Ainge if he did take him.
Interesting... two workouts. Cs are definitely interested, and I would be fine with Butler at #25. Love the kids story (reminds me a bit of Powe's; different story, of course, but both had hard lives).