Shout is an interesting universal chat room type app for the iPhone. There's really nothing special to it, as all you can do is set a username (or leave yourself anonymous) and send a message. After that all you do is read the shouts that people send out to the world.
Shout does ask to locate you, but there is little showing that you are actually talking to people in your area. However, you often see the same users on it time and again, making it easy to assume that there is some sort of region based get up to it. There's no restriction on what written language you see on shout, meaning that many times you'll be reading some Chinese or Japanese characters and wondering what exactly is going on.
Unfortunately for Shout, it suffers from two big issues: immaturity and censorship. Neither of these are issues of the app, but they are of the experience, and that's why we use an app after all. Conversations on Shout will range from Chuck Norris jokes and Hannah Montana fans to cybering. The censorship of the foul language isn't the other issue, it's the censorship of everything. You can't post an email, web link, or even say a company name without having the entire message wind up censored.
The concept behind Shout is great. Part chatroom, part Twitter. But what ruins it is the people. Unfortunately, while the app is pretty cool overall, your mileage may vary as to whether or not you can actually stand reading the garbage people say on Shout.