As gag reels go, I can't say this is the funniest one I've ever seen (and if you're at work, it'll have to wait anyway-- it's NSFW). But it is very interesting to see behind the scenes of the ever-more popular WoW-based web series The Guild. There are scenes collected here from the first three episodes, and it's cool to see the mostly unknown cast out of character and joking around in front of the camera.
They call this vid "a little thank-you to our subscribers," and say that episode 4 is "in the can" and coming soon. So enjoy, Guild fans.