What is it?
Here is the answer straight from pownce!
"Pownce is a way to send messages, files, links, and events to your friends. You'll create a network of the people you know and then you can share stuff with all of them, just a few of them, or even just one other person really fast.
Ooh, pick me!
At least to start, we're only opening up the site to a few people who can invite their friends. Soon, we'll let some more people in. Enter your email to get in on one of the next rounds of invites."
What does it look like?
The screenshots below give you an idea of just some of the things you can do. You'll be able to choose a theme and personalize your own profile page.