I've uploaded S5 slides, demo-examples online, and all sources using an Apache 2.0 license. I can especially recommend a look at the example using server push (Comet), Reverse Ajax and Scriptaculous effects (move the mouse over the empty table to start the thing moving). It shows what is currently possible to do rather easily with DWR. The course material is in Swedish, but should be rather understandable to anyone. The code is compatible with what is going to be release 2.0 of DWR.
Let me know if you want me to come presenting the code for your group of Java programmers. Otherwise, enjoy!