NetBSD is one thing, but I still can't get over running <a href="http://www.raspberrypi.org/risc-os-for-raspberry-pi/" rel="nofollow">http://www.raspberrypi.org/risc-os-for-raspberry-pi/</a><p>Having grown up with those machines suddenly finding a tiny board that costs $30 which runs this better than any of the desktops ever did . . . mind blowing.
FYI, the Plan9Front raspberry pi image is also surprisingly useful if you want a fast-booting graphical terminal (I use it to VNC and SSH to normal boxes):<p><a href="https://code.google.com/p/plan9front/wiki/9pi" rel="nofollow">https://code.google.com/p/plan9front/wiki/9pi</a>