There is nothing I can add to the overwhelming avalanche of praise for this film. Michael Caine is correct; Heath Ledger will receive an Academy Award nomination and should win. During the showing I attended, the audience often applauded at the end of scenes he was in, or gasped out loud in amazement at the very least.
The only criticism I have is that the ending was anti-climatic to the rest of the film, and was shot at such close quarters that it was difficult to tell what was going on. Otherwise, fantastic.
Ironman marks the beginning of the summer movie season as far as I'm concerned. It snuck up on me while I waited for "Indy" and "Dark Knight", and boy what a pleasant surprise it was! Robert Downey Jr. was our perfectly sarcastic brainiac hero, Gwyneth Paltrow was a great secretary longing for her boss, and if Jeff Bridges doesn't have physically the biggest head in pictures, I don't know who does. Ultra cool!