User blog comment:Dopp/Updates to How We Search/@comment-3508190-20120426190135/@comment-5473581-20120426233440

A similar tip that should work for most browsers:

Add
 * http://www.google.com/search?q=%s+site:wikia.com&btnI=I'm+Feeling+Lucky

as a search engine.

Unfortunately, after some playing around with that, there appears to be a problem with using "I'm feeling lucky" for long search strings, so your miles may vary.