I got invited to Pownce Tuesday night and I have been using it ever since. It's really cool!

You can tell it's still an alpha/beta (the AIR app is still alpha), as there are still some features that need to be built out, and there are some load issues, but, all in all, it's pretty cool.

My invites were gone within an hour of posting about it on my user group lists... but if you are on Pownce, send me a friend request to add me. I am bmeloche on Pownce.