David Platt of Rolling Thunder has just announced another 3 day Prism training course to be held July 7th-9th. You can find all of the details here. It’s web delivered so you don’t even have to travel!
It looks like it covers a lot of material – there’s a detailed syllabus here – from the basic goals and architecture of Prism, all the way through to advanced scenarios with modules, services, loosely-coupled events, and UI composition.
If you’re looking to use Prism to increase the quality of your WPF & Silverlight applications and to speed up your development it’s definitely worth checking it out.