Just joined Pownce. Thanks to Cogdog for the invite. I'm one of the nutty ones enjoying Twitter and will now try out Pownce. I know there is something to micro-blogging and learning but not sure how to put it all together. I do know it fits nicely into a PLE if you have created your own by mashing up several diferent tools.
The cool thing about micro-blogs is that you can also create accounts for businesses and events. I think this might be very cool for organizational communications.
Twitter, Jaiku, and now Pownce are the heavy hitters at this point.