Do you guys have a flagging system in place? If some coffee shop loc' insists on telling everyone he's going to kill them, this might be frowned upon.
Really interesting concept. Any plans to pair it with location checkins to let people chat with other people at a specific location (i.e., a specific restaurant rather than a general neighborhood)? I could see that as being interesting -- for example, arriving at a restaurant and either asking about what's good, or viewing a cached transcript of recent chats.
Great commercial!
Wishlist: Android version
We hear that, send a great android programmer our way!