Luckily, iPods can't be bricked. If anything goes wrong, you just hold the top and home buttons for a while and re-start in recovery mode. This will delete all files and re-install the firmware through itunes. It's really looking good. People have managed to include new backgrounds and icons. And of course, apps!
And yeah, it was a hack, not a 'mod' because the whole thing works by exploiting a memory dump bug which allows new code to be written directly into the iPod! Cool!
