Yay! The Fire team has finally gotten Fire to support the OSCAR protocol (again). That's the AIM protocol that iChat uses. This means Fire users can now talk to iChat users! Yay! If you are a Fire user, go get the new version from VerstionTracker. If you're not a Fire user, what's wrong with you?
It's a preference in Fire, you have to tell it to use the OSCAR protocol instead of the TOC protocol under Services.