hi,
i'm not sure that this is actually a violation of the GNU FDL, but:
http://www.fact-index.com is a blatant rip of wikipedia content, the only difference being that browsing into anything sucks in some google ad revenue via textads.
due to the extent of the content slurping they have done they show up pretty high in the google rankings as well.
the things people will do for a buck :/
leon