Local London ALT.Net-er and MVP Ian Cooper has put up a good TDD post with indications of more to come. I would recommend all to read this even if you regularly employ TDD and espeically if you are still coming to terms with the process. It covers basic concepts and acronyms that you should be aware of.
Check it out!
The book he mentions is very good for jumping in to TDD. I bought and read it on Ian's recommendation earlier this year and highly recommend it as a way to get your feet wet or to show colleagues how to begin the TDD process. Check it out here:
Kent Beck’s book Test-Driven Development, By Example