First of all, How in the world did this thread not get moved? Wow.
Anyway, I'm a big Heat fan, but no matter what argument you use, you can't validate Shaq winning the award over Nash. The Heat are a better team this year with Shaq? Well, the Suns were the BEST team in the league this year after being one of the WORST last year. Turn arounds don't get much better than that. Plus, as many people mentioned, Wade was already a great player last year. Sure, Shaq has made him better, but not to the level Nash has made a lot of his teammates (Amare, Joe Johnson, Marion, Richardson, etc.).
When Shaq was out injured, the Heat still won. Hell, they swept the first round without him hardly playing. The Suns went on a losing streak and looked really bad without Nash. That is the definition of Valuable. Without him, they lose.
As well, Shaq's numbers weren't that great, so the only argument in place is his impact on the Heat, where again, Nash's impact was much greater (a far worse team becoming tops in the league). I don't even think Shaq had an MVP caliber year. Just the fact that he was there and gave the Heat the dominance on the inside, allowed Wade to grow even more and further help the Heat have a great year. I'd almost vote for Wade for MVP over Shaq. He won a lot of games by himself this year.