The basic idea is that you can easily "chat" with other random users. I find this very hard to explain without showing so I will just run through the process here. You launch the app then you can write something in a text box and "shout it". The message gets uploaded and then you download a message that someone else has shouted out. You can then either download another message or reply to the message you have, effectively initiating a conversation with that person.
All comments and feedback appreciated, preferably on the Connect-UTB forums but I will check here as well
UPDATE: The app is now out on the Market.. feel free to give it a go!