I'm thinking more of a notification. Imagine monitoring a product support channel: if someone mentions you you want to know about it so you can pop into the channel if needed. I don't want to stare at a chat screen all the time.
Alternately, if you don't like Colloquy or don't have an iPhone, I wrote a module called ZNC Push that works with multiple push notification providers, including Boxcar, Prowl, and Notify My Android. I'm also happy to integrate more providers if someone has any requests.