Colloquy really looks like an OS X application, but I am a bit confused by the interface. When notices come up they appear outside the application - as bubbles at the side of the screen - and the text in them (which is usually truncated) is not selectable. When you click on a bubble it closes, and the notices below it do not move up, so you wind up with an unknown number of bubbles that have opened below the screen's bottom edge.

I will have to look at the ReadMe (shock! horror!) to see if there's a way to have those appear in the main window or in a secondary window so I can copy & paste their texts as my ad-hoc typing is atrocious.