This looks quite nifty. As you know you can't install normal apps onto the iPhone but with a rather spiffy looking web interface you have do all your fun IRC stuff and never miss a message even if your EDGE falls off 😛
http://colloquy.info/iphone/
It runs colloquy as normal on your Mac then sets up a small HTTP server which your iPhone can connect to
http://colloquy.info/iphone/
It runs colloquy as normal on your Mac then sets up a small HTTP server which your iPhone can connect to