I use Fraps to record WoW as movies. It does the job okay, but one thing that has always bothered me is the HUGE size of the files it creates.
I mean they are gigs for a few minutes of footage. It's insane.
Being it's 2010 and we can make invisibility cloaks and squeezable jelly now, I was thinking "is there something that is better than Fraps out there that I don't know about?" Something that saves the recorded footage in smaller file sizes?