I've managed to find somewhere to store the presentation deck I delivered yesteday and you can now download it from here.  I've also added the slides I had to cut from the presentation to enable it to fit within the SOA & BPM conference breakout length - these cover the throttling semantics at a high level and detail some common symptoms you might see during performance testing and what you should look at to resolve them.

There's of course more detail in the book!  Enjoy.