I think this is unneccesry question.
Everybody know it's BCG!
But the sign-ups threw invites are closed so you'll have to wait if you want to get in.
"In a hole in the ground there lived a hobbit."
BCG yes is the best but i think sign ups are closed right now
BCG great site
Max users 50000
Registered users 44936
We still have plenty of space and we have taken over 2000 new users this month, so we are open, just keep trying.
they are not closed, they are still open, its just not that easy to get in.