Together with the folk from Microsoft DPE, my colleagues and I have helped put together a series of free training materials for SQL Server 2008 R2. The presentations from these are now available in bite-sized pieces on the Microsoft Channel 9 site.
You'll find them here:
http://channel9.msdn.com/learn/courses/SQL2008R2TrainingKit/
Enjoy!
Thank you Greg for highlighting this one.