That really is cool, and I'd give my right arm (well, ok, somebody else's right arm perhaps...) to get my hands on that raid sign-up system for my raiding guild's use!

We actually used to have a similar thing on EU-Aggramar, called Uberpug. Pre-TBC they used to offer pretty much what the Leftovers are, but post-TBC they became just another raiding guild which is a bit of shame X(