I stumbled across a great Getting Things Done (GTD) aggregator site the other day - in fact, it calls itself "The Ultimate Getting Things Done Index" and it pulls GTD-related feeds together from a wide variety of sources.
This is a time-saving, focusing list - what could be more appropriate for the topic?
In addition to quotes, links to blogs and articles, you'll find links to software that may help you on your quest for personal productivity the GTD way. Enjoy!
Update: Thanks to Stephen for sharing some other resources: