Ironman is awesome!
Some of my favorite parts were the dialog between Robert Downey Jr. and Gwyneth Paltrow. Robert has a great screen presence and is the reason this movie works. I think the focus on the characters will attract a broader audience than most comic book movies.
The end credits had a really cool effect...definitely worth checking out.
...and the special effects weren't shabby, either. :)
Look for a cameo appearance by Ironman/Robert Downey Jr. in The Incredible Hulk June 13th.