Some interesting attempts at clustering or building maps of web search results (tip of the blog hat to EduResources). I cannot say I have found either of these more intuitive, but they are interesting.
Mooter is beta, but not bad. It sports a Google-like search engine (though there is no information or explanation what “mooter” is or does). A search result displays your query in the center of a map, with clusters of related terms around it, and clicking on the cluster essentially yields a Google-like list of results, though now a cluster is more refined than your original search.
For example I ran a query on “learning object” (It looks like you can copy/paste the URLs of search results, but this seems to fail due to a session variable) and you get this “map”