Text-to-speech IRC client on Mac OS X

Here's how to get text-to-speech on an IRC client on Mac OS X:

1. Download the latest Colloquy nightly build. The latest nightly build fixes some issue that prevented it from working with Growl.

2. Turn on System Preferences > Growl > Applications > Application's Display Style > Speech

3. Turn on Show Event Bubble for the Chat Room Activity event in Colloquy

Update: I think Adium may be even better than Colloquy. Adium 1.4 has text-to-speech. It also speaks the name of the speaker, which Colloquy doesn't do. And I think it will speak private messages - again, something Colloquy doesn't do.