iChat Proxy
I allways wanted some library which would allow scripts to communicate with a locally running iChat via rendezvous/zeorconf. Think of all the cool applications one could build! Get an iChat message for every new posting in your favorite Weblog, build an iChat-IRC proxy, post to your Weblog via iChat get a message if your Server reboots, your phone rings, etc.
Now I read in a blog posting that there is already some hackery named jChat which implements bits and pices of such a tool. Nifty.