"ASUS is bound by the GPL to make the sources for the software they’re distributing available, even if they have not modified them. (Check the license if you don’t believe me.) ASUS has posted a 1.8GB ZIP file on their website that they claim is the sources, but it’s not — it contains a few .debs (not even the versions that ship on the machine) and some kernel headers. (Perhaps they figured nobody would pull 1.8GB from their slow-as-molasses site and find out.)"
http://cliffhacks.blogspot.com/2007/11/asus-eeepc-first-impressions-and-gpl.html