This site is useful: http://linuxpreloaded.com/
Linux on laptop: http://emperorlinux.com/
I did some comparisons and realized that the Emperiorlinux is charging around $500-$900 premium per machine for the same model and the same configuration form Dell and Lenovo. I am not sure their service worth that much. Yeah they got more models than System 76 and LAClinux, but the price is just way too high.