Brian Noyes, a long time Prism advisor is creating Working with Prism 4 Series. You should check it out as Brian is a good writer and trainer with lots of successful customers using Prism. This will be a multi-part series and the first installment is already up. More details are on his blog.
Check out PluralSight’s free offer for 3 hours of online Prism training from November 12 – 14. The course will help you learn how to design and build WPF, Silverlight, and Windows Phone Applications using Prism 4.0. The course covers: Getting Started with Prism Bootstrapper and the Shell Regions Modules Views Communication