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I was trying out cuil (which I saw on Lynette's post) and found Libworm. Has anyone used this? According to the website:

What is LibWorm?
LibWorm is intended to be a search engine, a professional development tool, and a current awareness tool for people who work in libraries or care about libraries.

How does LibWorm work?
LibWorm collects updates from about 1400 RSS feeds (and growing). The contents of these feeds are then available for searching, and search results can themselves be output as an RSS feed that the user can subscribe to either in his/her favourite aggregator or in LibWorm's built-in aggregator.

Looking at LibWorm's website led me to The Blogging Libraries Wiki which might be fun to look at. I've decided these projects are like the song that never ends one thing leads to another and to another....