This has been mentioned on another thread, but JMS just tweeted a couple of videos of his talk which I'll take a look at later:
Part 1:
http://www.youtube.com/watch?v=WGVXg6JnSE0
Part 2:
http://www.youtube.com/watch?v=3Ek9u-8Eidk
Part 1:
http://www.youtube.com/watch?v=WGVXg6JnSE0
Part 2:
http://www.youtube.com/watch?v=3Ek9u-8Eidk