Refining searches

Interesting article by Brian Berstein about Tools that refine web searches.

Brian writes about Vivisimo that groups searches from Google in a more intuitive way. Seems to work OK for English, but not so good for other languages.

While Brian writes extensively about Vivisimo, he also touches on some other interesting search refinement tools, such as Grokker, Touchgraph and a few search engines that rival Google.