Ronda Rousey
Yonah posted a nice piece about Ronda Rousey, who took silver at the 2007 Kano Cup in Tokyo, despite an injury from an earlier match. Ronda's blog has video of her finals match, as well as matches from other tournaments.
From a link on Ronda's blog I see that her mom, former world champion AnnMaria De Mars, also has an interesting judo blog.