I know Knoppix has been around for a while an most linux users have probably tried it out but really, Knoppix is the shit. I booted it on my college computers and changed the win2k boot.ini file to display (Got Linux?) instead of the OS version and school name. Jus somethin stupid but as you know a lot more can be done with Knoppix, it's like the ultimate local hacking tool. Anyways, it's a pretty good dsitro overall, for those who haven't tried it yet you should give it a shot.

Try out Knoppix STD (if you haven't already)
http://www.knoppix-std.org/
it's knoppix, but based around security and networking.//

Having a fully loaded Debian system on a disc anytime I want it is pretty cool, and simply has too many uses to list.

It also makes WinPE look like a steaming pile of shit.