Pretty cool song
The song is actually pretty good. I wouldn't mind listening to it again, but the flash itself isn't very interesting. I'm just listening to the song as i write this.
The lip syncing was very good though. Even during the humming part it was good. The arm movements ant stuff are a bit clumsy, but using tweens for them will usually look that way.
Anyway, nice work overall. It would be a good base for a clip based on this song. Like you could have him singing, then flashbacks to other things happening or something. Just an idea.