Where can I find a nice, free video editor/movie maker?

I’m just making youtube films, but Windows Movie Maker is driving me insane.

Also, I’m not trying to be cheap, but my parents are tired of me buying software and anything within the category of technology. (Including Xbox games. .) The one I’ve been looking at for awhile is Sony Vegas Pro 9…but my parents won’t let me spend the $500.

Things I’m looking for: Lots of effects, easy to match audio (songs) to video, transitions, something that works on Windows Vista, etc etc.

Things I’m not looking for: A 30 day trial.

Thanks!