Well, in case you've been living under a rock for the past few days (like I have) this will be news to you. The Xbox 360 DVD drive firmware has been hacked to allow booting of "backups". The team responsible have wisely decided not to release the hack as its main use will amost certainly be for piracy (hence backups being in quotes - though backups would be a legitimate use in some countries).

For more details consult your favourite console gaming website (e.g. Xbox-Scene or Maxconsole).

This hack may be of some use to the Free60 effort if we can find an XEX that is capable of booting Linux.