Linq to XML in the App_Data folder.
You will hardly believe how fast it is.
I've migrated Oracle systems for companies over to Microsoft systems.
Outside of the CLR and community advantages I'd point out...
A typical company may save 6 figures the first year alone when migrating from Oracle.
Notice the key word FREE on the main page: http://asp.net
Here's a script method:
Find more with my ASP.NET Coop: