Wisdom

Craigslist Foundation
http://craigslistfoundation.org/index.php?page=Nonprofit_Resources

Jayne Cravens
Sure, if you want to split hairs she's our competitor, but Jayne's blog is loaded with advice and astute observation, and she also maintains a collection of documentation and training materials to help you get your feet wet. http://www.coyotecommunications.com/

Organizer's Collaborative
A Boston-based organization, the OC has great resources on their site, and runs conferences you might be interested in.
http://organizerscollaborative.org/

Green Lights
Like the Organizer's Collective, Green Lights has a lot to offer, and via the web can help those far beyond their region of Central Texas.
http://greenlights.org

Progressive Exchange
This is an active bulletin board, frequented by a lot of people just like you! The intersection of non-profits, often technology, and lots of great advice. If you don't find the answers you're looking for, sign up and start a new thread.
http://www.progressiveexchange.com