If you've never taken a look at this tool, it's more than worth a look. Here's a link to Chris's positive SearchDay review: GuruNet: A Handy Information Magnet.
Btw, in the past few months GuruNet has:
+ Released a desktop search beta
+ Launched a version of their client for the Mac
+ Launched a web-based version of their product. You can now access most of their content without having to download any software.
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