Like Gustaf I've got a handful of Joost invitations to give away. If you're interested get hold of me on irc or Jabber (not in the comments here, that's far too easy), if you need a hint, Foaf...

I'm not going to be online much this weekend, so "patience Grasshopper". If you're also thinking of blogging about your invites, please link to any other folks you see ofering them, it'll make invite hunting much easier.

Update 2006-03-19: I've still got a few left, and a Google search for "Joost invites" throws up a few others offering invites, such as Martin Varsavsky, Tom Raftery, and Chris Green.