We had our first Fat Chocobos dungeon run using TeamSpeak yesterday, basically a trial run in a low level dungeon (in this case, Haukke Manor) so Marick could progress with the storyline. It was pretty awesome, I have to say, and rather hilarious. I don't think I could do this every night at all, but I think doing it on certain nights will prove entertaining at the very least.

I certainly don't think I would use it just for idle chatting when crafting or anything, though, as I don't want to split Fat Chocobos into two groups (those who use TS and those who don't), and I also want people to keep talking in the LS chat as that's the best way to encourage more people to get involved and whatnot.

The next step will be using it in 8 man runs for things like HM primals and dungeons like Praetorium.

EDIT: Fixed up a list of tips for installation & configuration and added it to your post, Marick.