Recently published on MSDN – “What’s New in Microsoft SQL 2008”. Sign up now in case the free offer expires:
https://www.microsoftelearning.com/eLearning/offerDetail.aspx?offerPriceId=139087&tapm=A87S20G15
There are three courses (3 hours altogether):
Clinic 6188: What’s New in Microsoft SQL Server 2008 for Enterprise Data Platform
Clinic 6189: What’s New in Microsoft SQL Server 2008 for Business Intelligence
Clinic 6190: What’s New in Microsoft SQL Server 2008 for Database Development
Enjoy!