Two things I haven't heard anyone mention.
1. If JO ends up getting traded to a non-contender, what are the odds he arranges a buyout and works his way back to Boston in 30 days (that's still allowed, right)? We'd still need a center as much as anyone, and he's still better than someone we'd be able to get with the mini-MLE. They would obviously be VERY careful not to even hint this publicly, but sure seems to me like a possibility.
2. Haven't heard anyone mention whether David West and Chris Paul are particularly good friends, after playing together for so long. Might David West be to Chris Paul what Ray Allen was to KG - the incentive to acquiesce to a later Boston trade? They've had some success together, and David West is still (relatively) young; maybe Chris Paul is more willing to give Boston a shot if he knows at least David West will be around in 2012. Trade would probably have to wait until the season started, might need some of the recently-signed players to go alongside Rondo in a deal.