I remember being in Japan during 2008 Olympics and watching the judo games on my small Japanese tv. They had judo team commercials everywere at the time. Now, as the London games are approaching, I intend to watch the games again. Even though many of the throws (especially the way they sacrifice position) might not be a good idea for BJJ, you can at least catch world class grip fighting and some practical throws in the mix..
A good blog about an Australian guy preparing for the competition at: