Do you want to join an exclusive/beta site that requires invitations? Try InviteShare, a hub where people share their invites to many popular sites like pownce, joost, moola, 8apps, spock etc. They have an abundant number of invites, I was able to receive my invitations to all of these popular sites within a few minutes. I’m glad that someone took the initiative to start such a website to connect people with invitations to those who do not. I think the defining theme of Internet is becoming collaboration.
Update: After a week since its launch, InviteShare has been acquired by TechCrunch for $25,000.