How are people unit testing code that uses Linq to SQL?
LINQ to SQL is actually really nice to unit test as it has the ability to create databases on the fly from what is defined in your DBML.
It makes it really nice to test a ORM layer by creating the DB through the DataContext and having it empty to begin with.
I cover it on my blog here: http://web.archive.org/web/20090526231317/http://www.aaron-powell.com/blog/may-2008/unit-testing-linq-to-sql.aspx