Slides from this year's JavaOne Technical Sessions have started to appear at the Sun Developer Network site. Not all of them have been uploaded yet but you can be sure they will be there in a couple of days (or weeks at most), no word yet on the videos but I suspect that most of the JavaFX/NetBeans related sessions will be up as soon as possible.

BOF sessions are not available through SDN but you can search for them at slideshare.net, Jonathan Boutelle was kind enough to create a JavaOne2008 event page, it has some slides attached already.