This is my week for information about unit testing against databases, apparently.
MassDataHandler is available from CodePlex:
The MassDataHandler is a framework to assist with Database Unit Testing. The framework makes it very easy to insert test data into a database, which in turn makes it very easy to write database unit tests. The user merely needs to specify their relevant data in a simple XML fragment, and then the framework uses knowledge of the database schema to do all the grunt work and convert that XML data into SQL, from which it populates the database.
Download it here.
(Hat Tip: Roy Osherove)