They've stopped the invites. In fact, they essentially revoked invitations ... i.e. people I invited last night couldn't use their invitation email this morning. Unless Google turns it on soon, they're gonna lose a lot of good will. They've already managed to tick me off.

I also find it funny that people were using Facebook's wall to distribute Google+ invites to their friends. And I always thought that seeding a social network was hard :-p