Not very many players mentioned in this thread who seem like they'd be a good fit. Maybe Duhon, maybe Barnes.
Has Buckets EVER played on a team with a winning record other than that monstrosity here that blew up in the playoffs? Isn't it telling that Miami - in hardcore tank mode - didn't feel the need to invent an injury for him? I have a real, real hard time seeing KG being stoked about getting his old teammate back.
Posey's got to be re-signed, and if Eddie House DOES walk, the player that I think is the best fit as the third, combo gaurd off the bench is our boy Delonte. Make him an offer, see if Cleveland bites. He'd be a great fit playing behind Rondo and Ray, and we know he's got the competitiveness and the cajones to do pretty well on a bigger stage. I'm just not sure how much Cleveland's in love with him; I suspect you're looking at the full MLE for maybe three years.
Anyone think PJ Brown's coming back? It wouldn't surprise me in the least for him to "retire," only to be coaxed back out come next All-Star break. He's been awesome in the playoffs, you just wonder if he could keep it up playing 15-20 minutes a night for a full season.
EDIT: Diop might be a nice fit as a backup 5; his skillset seems to be pretty similar to Perk's, but you can always use another rebounding, defending big.