The day before JavaOne starts, Sun had a free event called CommunityOne. There were sessions about Netbeans, Glassfish (Sun's JavaEE server), OpenJDK/Mobile & Embedded, Web 2.0, Linux/Solaris and OpenSolaris.
I took session's about next release of Netbeans, Netbeans 6.0 (It is now also possible to download a special release of Netbeans for the JavaOne event, this release is called Netbeans 6.0 Preview). I was very impressed about the new included Netbeans profiler, it look very useful!!
Netbeans's mobility pack now also support the Sun Spot technology, there was a great demo from Bob Beasly, he had used Sun Spots to train his dog over the internet. It was a great demo!!