
I just bought Lime Chat for iPhone because I couldn’t figure out how to use Colloquy for iPhone with my public IP address. It’s a $5 app, but I think it’s worth it. It’s easy to use, but it has all the features you’d want in an IRC app (auto-join, whois, multiple server support, ect.). Anyway, buy it an check out #tumblrs on irc.freenode.net … even though I’m banned from it.
(you can find me in #xkcd on irc.foonetic.net)