This Developer Network article currently has 23 (out of 34 planned) videos demonstrating the many areas of JBuilder 2007.
David I has been posting a bunch of JBuilder 2007 stuff on YouTube as well. Here's an ad from the launch we did.
More YouTube content:
JBuilder 2007 Introduction by Michael Swindell - Part 1
JBuilder 2007 Introduction by Michael Swindell - Part 2
JBuilder 2007 Introduction by Michael Swindell - Part 3
JBuilder 2007 Overview by Joe McGlynn - Part 1
JBuilder 2007 Overview by Joe McGlynn - Part 2
JBuilder 2007 Overview by Joe McGlynn - Part 3