Anti-Trend
Nonconformist Geek
I recently came across this very cool (and very geeky) bootable Linux distro called GeexBox. It's a free ISO that acts as a multimedia operating system. It comes equipped to play DVD, DivX/Xvid, CD, MP3/Ogg, Quicktime and lots more. All you do is boot to it and load your movie via disc, USB device, or even network share. It's only 4 megs to download the ISO, available in English and French, and would be a great companion for your home built console or multimedia system. No HDD required :)