Status Symbol 1.0 is a standalone application that can manage your iChat AV status… [MacMinute]
I’ve had a chance to play with this bit (at the bottom of the page) and I have to say it’s pretty cool. You can easily create custom as well as dynamic updates to your IM status.
Another update… my friend on AIM cannot see any messages other than that I look available. This may only be a iChat feature/function.