We use 37 Signals’ Campfire at work and love it. There is an iPhone app but we think it can be pushed even more. This is my first iteration of the app. Some features I’m thinking of:

– User can swipe left and right to toggle between rooms that user has added.
– Tap on the top-left button to reveal settings
– Upload a photo inline to the chat
– User can search archives
– Tapping on the title of the room will allow users to see a list of all open rooms, to be able to jump to another room instead of swiping through all of them.

Campfire is fire-related. Other names of clients like this includes Flint, Sparks, etc. Ours…Napalm.

See it on Dribbble