I've used it before but I just don't play PC games enough besides WoW. If enough people joined in I'd give it a try from time to time I suppose.
Though I did just create my own private WoW server so I can pwn any instance all by my lonesome instead of spending a year trying and thought about inviting others to join it. Kinda cool to just say hey I wish I was dual wielding Illidan's swords, type ".additem" and bam I've got'em. Though making myself powerful enough to one hit him seemed kinda less than I hoped for in the end. :)
Amazon has a list of popular headsets here. I ended up buying a bluetooth headset myself, figuring I'd get enough use of it between the PS3 and my cell phone, since there all kinds of hands free laws going into effect around here. It's kinda worked out.