Definitely intriguing.
It would give us flexibility to use Nate in a trade, as with Delonte, Marquis, and Rip, we wouldn't need him.
It'd be also interesting to run a lineup of Ray, Rip, PP, KG, and Shaq. How could anyone guard that lineup with all of those shooters, plus Shaq down low?
Still, I don't see it happening.
As Roy pointed out, the chances that Detroit buys him out to begin with are low. Even if that small chance happens, I don't see him coming here.
He already has his ring, so he doesn't need to latch on like PJ Brown did two years ago. He's probably better off going to Chicago, Dallas, or even Miami (and play as part of a big lineup with their Big Three).