http://www.inviteshare.com

Down for maintenance right now, because it was just purchased by TechCrunch,

http://www.techcrunch.com/2007/07/12/get-an-invite-to-any-private-beta/

Quote :

"This is a fairly simple service, but it does the job perfectly. Go to the site and register. Then browse the various private betas that are being serviced - pownce, spock, myskitch, mint, etc. - some of these I haven’t even been able to get into. If you have invitations, invite the people on the top of the list and confirm that you’ve invited them by clicking on their name. If you need an invite, add your name to the list."

7/20/2007 12:38:38 PM

yeah, it's neat that a major tech site bought the thing, but it's going to be forgotten about in a month

7/20/2007 12:42:22 PM

Just got onto this site and already I got some good invites. I would recommend it.

8/21/2007 4:25:17 PM