The latest Bizz Buzz article is up on GameSpy. This week they take a look at various subjects including the recent interesting news that you can put Linux on the Xbox without any modifications needed to the hardware:
Though I haven't had a chance to go through the whole document, which is posted here, it focuses on the vulnerability of the Xbox Dashboard, because it apparently doesn't rely on the same security aspects as when a game or DVD movie are put in the CD tray.
The poster goes on to note that the Dashboard compares files against specific values that are internally stored -- though surprisingly .wav audio files or .xtf font files seem to be excluded from the process. By installing a "malformed font file," via a memory card or by swapping out the Xbox hard drive, the font files can open the door to installing other boot software. In a proof of concept, the poster uses the process to load Linux on the Xbox.