Steve (once again with the correct links),
I have found the following resources on agile/lean methodologies useful
2. Practices of an Agile Developer (http://www.pragmaticprogrammer.com/titles/pad/)
3. Getting Real" (http://gettingreal.37signals.com/). This one is written by the folks who Developed RoR and BaseCamp.
4. Martin Fowler's site also has some cool info on agile methodology, tdd and other related topics. Start here http://www.martinfowler.com/articles/newMethodology.html
hope this helps.