Here's an entry, first impressions with ASUS UL30VT and Knoppix 6.2.1.
Works quite well PC only when you first get it to boot. I had to use the boot screen, by pressing ESC on bootup. Runs well from USB stick or harddrive, no problem with the Atheros wifi either. For more permanent changes, there is a 350GB NTFS partition that can be deleted and space reused for Linux/Windows partitions. I think I should try to setup a new disk instead, but I don't feel quite confident about this, as there is no Windows install media, and I'm not quite sure about recreation of the special ASUS partition either. In the old days, I could use the WINNT bootloader to start Linux - is this still possible in Win7? The easiest and least intrusive thing to do, is to boot from USB and have a Knoppix copy on disk.

Using an external monitor proved much more tricky. I had to boot with the cheatcodes no3d and screen=<actual external monitor resolution> to make it work, but then the laptop lcd may not be very useful..