AppleTVHacks.net has put out a $500 bounty for the first team who can successfully run asterisk on the Apple TV.
Asterisk is a complete IP PBX in software; PBX being a telephone exchange system like you may find in your office. It runs on a wide variety of operating systems including Linux, Mac OS X, OpenBSD, FreeBSD and Sun Solaris and supports Voice over IP in many protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware.
Read all of the rules here:
http://www.appletvhacks.net/2007/03/...-apple-tv-pbx/