UX Pond is a great idea - a search engine that only trawls websites related to usability and user experience. As their blurb says - "Why search the ocean when the answer's in the pond?"
This is definitely one to bookmark for whenever you're on the lookout for advice or resources for a user-centred activity. I like their openness about who and what is being trawled. The list of sites is a really handy resource in itself.
UX Pond - the search engine dedicated to user experience blogs, journals, discussion, events, UI patterns and tools