On Wed, Dec 8, 2010 at 10:46 PM, Amir E. Aharoni amir.aharoni@mail.huji.ac.il wrote:
For some time i used to fight this problem by adding "-site:wikipedia.org-site: wapedia.mobi -site:miniwiki.org" etc. to my search queries, but i hit a wall: Google limits the search string to 32 words, and today there are many more than 32 sites that clone Wikipedia, so this trick is also becoming useless.
If you have Firefox there's an addon that will let you filter out mirrors (among other things). See:
http://meta.wikimedia.org/wiki/Mirror_filter