BlogMatcher is a program that helps people find weblogs that match their interests and find like-minded blogs. When given an URL to a weblog (called "Reference Blog") the system finds other blogs that appear to discuss similar topics.
It needs some work yet. For instance, I found that the blog most like Jane Galt's is....are you ready for this?....Jane Galt.
Then I tried Susanna Cornett. What do you know, I'm #2 after her own blog. Now there's a woman who'll sleep well tonight.
What about this humble offering? Three of the top five are Glenn Reynolds. Then there are two I haven't read before - Simone Koo and Arma Virumque (a blog by The New Criterion). Rounding out the top 10 are Steve Green and Bill Quick, then Quidnunc, ChicagoBoyz's old home on Blogspot, and TV Henry. Hmm.
How about James Lileks? As of 5 minutes ago, it said "no matches found". That I can believe.