Many people know that Google allows you to search any given site using site:www.seobook.com keyword

One cool feature that many search engines lack is a "search this collection of sites" feature...

UNTIL http://lushe.net/ just changed that. Lushe allows you to easily build a list of your favourite sites, and then search only those sites using google. This toolbar bookmark tool allows you to only search sites relevant to you and your interests.

Found on SearchBlog.

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