Introducing Facing.me
acko.net
acko.net
When they send out the invites, they'll probably send it to all the people who registered at the same time (hopefully a lot by that time) and when they all join on at once, they all see each other online. No wasteland problem.
Seems like a good solution to me.
And you could argue that in a crowded market, polished execution is in fact required to be viable.