The Pragmatic Studio: Ajax is coming to Boston September 11-13. You can check out the site for complete details, but I wanted to mention one thing here: our approach to hands-on exercises.
A big challenge with Ajax training is creating useful hands-on exercises that don't bog attendees down in the details of setting up some random server on their laptops. For the Studio, we have finessed this problem by providing a shared server. Attendees browse to a page, do "View Source", copy a file to their local machine, and edit the HTML file to make calls back to the shared server. This keeps things simple (no server setup) and forces everyone to think about keeping their Ajax code decoupled from server implementation details.
Since calling a remote server from a local HTML file isn't directly legal in Firefox, we provide various versions of the following hack to enabled limited cross-site capability.