Maggette seriously miscalculated by opting out - I assume he figured he wasn't going to have a better year statistically (since Brand was out all year and Cassell left), so he wanted to opt out with his value high and sign/sign-and-trade a big deal. Unfortunately, he didn't recognize that A. few teams have cap space, and B. he's been around enough to be a known commodity, and isn't as overvalued as he figured.
I think now that Baron is going to the Clips, he'll either sign for decent money in Golden State (assuming Arenas shoots them down, which he probably will), maybe Washington (if Arenas leaves) for some kind of small-ball setup, or he'll get the MLE somewhere. If he's down to MLE deals the factors will be playing time/role, taxes, and winning, probably in that order. We can only really offer him the third. I don't see it happening, and I see the potential of Maggette sulking all year if he came here and realized that 15-20 minutes a game is all he's really going to get.