http://www.nbadraft.net/node/8379 names Deonte Christmas one of the best undrafted FA's.
"Perhaps the biggest surprise here. Christmas, a 6-foot-5 lights-out shooter, was projected as an early-second round prospect. His lack of athleticism was probably the thing that knocked him off the draft board, but there is likely still a place for him on an NBA roster. He's got an unorthodox release (but then again so does Michael Redd) which may have concerned teams. He also has great length, elevates well on his jumpshot and, after three years as a starter at Temple, is as ready for the NBA as any second-rounder. The (local - Temple) Sixers recently signed him to their summer league squad."
He's also playing with the Clippers though (after he's done with the SIxers in Orlando), but maybe he'll cancel if the Sixers offer him a guarateed deal.
On a side note: Yaric (you know the guy w/t Bugs Bunny Tie: former Clipper Hope Yaroslav Korolev) is on the Knicks roster (Along with Skeeta and Sene, it's quite the Bust-fest over there). I'm still rooting for the guy. It's not his fault Dunleavy Sr. likened him to his son and drafted him over Danny 'Supposed Knee issues" Granger. I see Korolev as a poor man's Turkoglu (as in Sudan-poor, not "I can only afford 2 IPODs-poor").