Looking for an invite for x web 2.0 site

I've just came across which aims at distributing invites for "private betas" for over 46 sites. Included is Joost, Pownce, 8apps, Dopplr and loads more.The reason I mention this is that I'm probably gonna send all my invites that way so I don't keeps taking up everyones blog space with more "I have x invites for x" posts