Kevin Kline (strategy manager for SQL Server at Quest Software) and Brent Ozar (SQL Server DBA expert at Quest Software):
Ozar: There are two common scenarios for why you would consider using something other than your typical relational database. One is data that is not worth very much money.
Kline: We’re going to look at other ways to look up data: key value stores, what’s the other one called?
Ozar: XML columnar storage, XML property bags.
Sounds pretty uninformed and makes me wonder what is known about NoSQL in the Microsoft world.