Pownce is what you can probably call a Twitter on steroids, besides the IM features you can send links, files and events to a friend or a specific group of people. The catch? Well, if you want to send bigger files up to 100 mb and get rid of the ads you can go Pro for 20 bucks a year.
Pounce even has a Twiterrific like Apollo AIR based app that you can download 
Looks clean and sleek.
Pounce is still in Beta but I have 6 invites, so if you want to try drop me a comment.
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The Pownce by Ricardo Saramago, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
Hi, I’d love a Pownce invitation. Thanks
I’d like to try it out too. Thanks
I’ve already been invited by someone else. Thanks anyaway
*anyway