As expected, Iron man’s been getting reviews for the movie as solid as reviews fanboys have been giving the trailers for the last year or so, with even the less glowing ones mentioning just how perfect Downey Jr. is in his role as Tony stark, and how awesome the armor is. However, Butterboom’s review in particular has a pretty badass spoiler. If you’ve managed to avoid any word about the movies to this point, suffice it to say that the theatrical version - not a preview copy - has hit the scene in Hong Kong, and at least one rumored scene made it into the final cut! If you’ve been following along at home, you’ve probably already got a hint as to what’s in the above link. If not, I think you’ll be wanting to stick around after the end credits along with the rest of nerd-dom.

Quick list of a few other early reviews worth reading:
Comic Book Resources
Empire
Variety

Movie/TV, Comics