I am running knoppix 3.4 c't edition on an Acer Travelmate alpha 550 and like it a lot! It works best with the following cheatcodes:

knoppix nopcmcia screen=1400x1050 xmodule=savage

* with pcmcia autodetection it will not start and since I do not use any pcmcia hardware it works fine without...
* I bought the travelmate with high resolution 15 inch display, thats why I need the screen=1400x1050 option
* using xmodule=savage gives the final display boost so divx movies don't shake while beeing played
* sound only plays on very low volume level compared to windows output... putting alsa cheatcode doesn't help... anyone knows how to fix this?
*I never tried the built-in modem using linux nor my usb-adsl modem "octal a360" which supposedly works if you know how
* my firewire disk works fine if I conect it before starting knoppix