Pownce! Here's a screencast tour – Oh yeah, I need more friends too
Pownce is a fun way to send notes, links, files, events, and all your other “stuff” to your friends. It’s been compared to twitter and Jaiku over and over so I’m not even going to get into that. After you receive your golden ticket (Pownce invite) create your profile and add your friends. You can then compose messages and choose to have all your friends or specific friends to be the recipient. It’s easy to add links, files (up to 10MB), and fill out a quick form to announce an event. If you don’t want to deal with going to your Pownce page every time you want to read messages or sent notes, you can install the desktop software that lets you use Pownce and it’s wonderfulness just like your IM client. Here’s my screencast tour of Pownce:
Flash Demo 4m17s

