Just to continue to be the Devil's Advocate on every position in this thread, I think the question for Detroit is: What amounts to value? If the Pistons value capspace above all else, the Spurs could put together a deal that could maintain that while giving the Pistons a player (Hill, Mahinmi, Splitter, for instance). In that scenario, the Pistons get value insofar as they get to keep the capspace they covet while also getting a young player instead of nothing for Rasheed when he departs. Of course, that depends on the Pistons deciding that the young players the Spurs could offer would actually have value -- and as I've said, I'd agree that the pickings in SA in that regard are fairly slim.
If Detroit decides to ship out Sheed, I don't think Dumars does that without ensuring his capspace for 2010 and that likely means that the talent target in that deal from his standpoint is going to be a minor, younger player. Otherwise, it becomes very difficult to make any move to deal Rasheed.