Presenting Java 5

Orbitz is still using J2SE 1.4. The architecture is working hard on a new framework that will include a move to J2SE 5. At Transora/1Sync/GS1US we had been using it for over a year and I am the only member of the Corporate Development Team who has professional experience with Java 5. So, Alex (my boss) asked me to present the new language features in next weeks dev meeting. I want to include new classes to Java 5, like StringBuilder, not just language features.

What are some features and classes you think I should include? I am planning on making this public in some way. So, what are some things you would like to know more about in a presentation? Are there rumors you would like to have dispelled about Java 5? Is there a rumor you have heard about Java 6!? Maybe I should be tackling those too.