Yukon: CLR in the database
A book chapter is up for public review on TheServerSide.Net that describes the benefits of having the CLR in the database.
When I first had this described to me at PDC I thought it was good, but I didn't think too much of it. I was talking to my friend Steve Broderick the other day and he helped me realise that it could be a lot more beneficial than I first thought. This chapter describes the architecture behind the CLR in SQL Server innovation.