im definitely stoked about this movie. robert downey jr is perfect for the part. the part of a bored alchoholic billionaire will be played by a bored drug addicted millionaire. its not much of a stretch. they are both pompous, and speak quickly with a lot of technical jargon.
as far as the armor, its a real suit. downey actually wore it during filming. in fact, he insisted on wearing it, not allowing a stunt double to do it. he said it was torture, but that the torture was exactly what he felt was necessary to understand what Stark feels. IMO, he will be great.