We're already using IRC, Wave, Sidewiki, e-mail, smoke signals, lasers and Meta comments.

Another method won't really change anything. We already have a third place notwithstanding your slowness in creating one in any official capacity.

Nevertheless, this kind of thing is important to community. It's taken you long enough to realize that.

Knowing that, I don't see why you should seek to use some new thing when the community has already organized around several old things. Just pick one of those (probably the largest) and make it official (or make an official branch). Or just leave them be, but facilitate finding the existing unofficial third places (a link to the popular IRC channels/wave accounts/sidewiki/e-mail addresses/GPS co-ordinates of smoke/lasers/etc).