The movie does focus more on Tony Stark than on Iron Man, which probably explains why many have complained that "nothing happens" in this flick. But Robert Downey Jr. is just so damn good in this role, with great scenes and juicy dialogue (the hearing was a great example of this) -- I came out of the flick remembering RDJ's performance, not Iron Man's action scenes.
Gwyneth is woefully underused, Mickey was so good I wish his character had more to do, Sam is brilliant as always, Scarlett was smokin', but RDJ -- damn, he gets to have all the fun!
cheers,
supervij