With all the people saying to LH to get out, who would really take him? Hes got a track record of causing in-fighting within the team at the highest level and seemingly will take anyone down with him when he (or the team) gets caught. As good a driver as he is, he does seem a handful to manage and I would never feel comfortable around him if I was a team mate or even an engineer/manager...
Hamilton has a pretty good relationship with his engineers by all accounts, and most people take the view that Alonso was the one more in the wrong over the farce of his first season.
Renault aren't going to take him; they've got Alonso.
Force India: Well, they'd bite his hand off but it's hardly likely.
Toyota: Probably bad blood now, but can you seriously think they're going to look at their line up and go "well, we'd rather have Trulli/Glock than the youngest ever world champion?" I don't think so.
Ferrari: Well, Massa has their favour, but Kimi has severely underperformed last season. It would depend on how they thought he'd sit with Massa, and how Kimi does this season, I think. Hamilton is clearly a better talent than Massa though.
Brawn: Button is probably secure, more so by the end of the season, but Rubens is getting on. I think they'd take Hamilton for next season like a shot.
Toro Rosso: Not likely. If he was going to the Red Bull teams he's more like to go for the top team.
Red Bull: Vettel can be pretty secure but Webber's never really lived up to his potential. And, remember, Red Bull are a frickin' drinks company - they're in this as advertising through and through. They'd snap up a exciting, young, mixed-race driver like a shot.
BMW: I wouldn't want to put Hamilton in with Kubica, while Heidfeld is a great number two. Can't see it.
So of the nine other teams, I call just four as a definite no.