Just came up with a simple solution. Script tags don't fall victim to the same origin policy, so I don't need all that crap.

And, DJ, my goal of making it use the sites cookies is to not need to use usernames/passwords.

Oh ok. Well I hope you don't have too much troubles implementing a secure way to do this.

I think I just got it.

http://netham45.org/OmnomIRC_Test/

^ This should automagically rip out your Omnimaga name.