Yeah, Iron Man is pretty damn good, what can I say? The last line (before the credits, that is) is classic. Everything locks together nicely, even though the screenplay is pretty much becoming Marvel screenplay version 1a. It's really all about the gadgets and the acting(!), and both are tops.
Get ready for the Avengers, come 2011. That should be a film that will make me poop not only the pants I'm wearing in the theater while watching it, but also retroactively poop every other pair of pants I own.