Here is a screencast that demonstrates the MSTest and Team Coverage integration in TestDriven.NET 2.0. The testing support that comes with Visual Studio 2005 Team editions was designed to support many different types of test. For example is supports manual tests, integration tests, generic tests as well as unit tests. The interface for TestDriven.NET is tuned specifically for doing unit testing and test driven development. By combining the two you can execute unit tests written using Microsoft's framework in a way that is more efficient for doing TDD.
For a longer explanation I recommend you read Brian Button's post on:
Real Test Driven Development with Visual Studio Team System
You can watch the screencast here.