On top of that, @replies would be awesome as well. We already have a nice Back Bay/Cambridge/Boston chatroom going that is going along fine, but we have already naturally used @replies since we are so used to them.
yea definitely sounds necessary. im just wondering - lets say you leave the 1 mile area, somebody @ replies you, when you open the app you'll be in a totally new spot and the message will be at the old spot.