Andru writes –
Since the iPhone launched, we have been on the lookout for all the cool web apps that we were sure would begin to show up. We have had quite a few come along, but just a few minutes ago we were able to log in to IRC on our iPhone, and thought that was pretty nifty. So much so, in fact, that I thought we’d share the process on how to do it yourself. Do note, though, that we used Colloquy to help us out here – that is an OS X application, so you do need a Mac to use this method.
How To: Use IRC On The iPhone With Colloquy | Gear Live – Link.