Did you ever wonder how you can do TDD with Linq to SQL, since there are no IOC interfaces to play with? Well, neither did I, quite honestly. However, Matt over at the Wayward Web Log did, and he puzzled out a way to do it. It's pretty zany stuff -- he plays with remoting and reflection to pull it off -- but it looks like it would work. Not an article for the faint of heart, but good to have in your toolbox if you need it.