Heh, on the same day I let people know I have invites, I get an email from Leah Culver (the lead developer for Pownce). Inviting me for a launch party for Pownce officially. Unfortunately I will not be able to make it since I will be in meetings all that week.
"Pownce will be open to everyone starting January 22nd. No more invites! There's also a bunch of new features, including a new upcoming event page, mobile events, and an improved desktop application."