Colloquy is now on the app store. It is only $1.99. Please go check it out! :)
http://mobile.colloquy.info On the other hand, if I hear one more person complaining about an open source project charging money for software, or that Colloquy should be free because it used to be free a year ago, or anything along those lines, I will...do something really unpleasant to you. What the hell is up with the assumption that open source means free. Open source means open source, and colloquy mobile source is in svn for anyone who cares to look at it and get it on their phones (with $99 to apple, or jailbreak).
On the other hand, I am open to suggestions that aren't "stop charging because IRC clients should be free" or something as equally outrageous.