I like Twitter better than Pownce so far. Pownce is prettier and has more features. But Twitter shows me more useful information. Bigger pictures, and a name that I can customize. For instance, here I'm just "Robert S." Over there I'm "Scobleizer." That's better.

Also, Twitter just asks one question. What is Pownce's question? I like the simplicity of Twitter. To tell you the truth Facebook is the one that really is interesting to me as a tool to keep in touch with my friends and business contacts.

Agree with the Facebook but that is also more of a full blown contact system where as Twitter is the daily idle over the cubicle type chat