Here's another something I'll be putting in the sidebar. Sometimes I get questions about getting started (or re-started) in running, and for the most part unless you're a beginner, I usually don't have answers for you. And even if you're a beginner, there's a good chance I don't have the best answer for you, but I can still point you in the right direction.
I'll be updating this regularly, so check back regularly.
Jeff Galloway's Site. See also his books Galloway's Book on Running and Running: Getting Started
Runner's World Need something? You'll probably find it here.
Hal Higdon Training from the 5K to the marathon.
Competitor.com Tips, tricks and training ideas.
Running Times It's like Runner's World, but without the phrases "New Year New You!" or "Your First (or Fastest) 5K!" (also without forums)
Kevin Sayers' Ultrnr web site: Want to run ultras? Go here first!
Stan Jenson's Run 100s: Go long. Real long.
IrunFar.com Bryon Powell's blog with the latest news, interviews and gear reviews. See also Bryon's book, Relentless Forward Progress: A Guide to Running Ultramarathons.
UltraMarathonRunning.com - Training resources for your next Ultra Marathon
Ultrarunningpodcast.com - incredibly informative interviews that are certain to help you get through you're next ultramarathon.
Barefoot Running University Jason Robillard's blog
Runner's World Barefoot Forum
Running and Rambling - not necessarily a how-to but Donald posts frequently about minimalist running and minimalist shoes that are out there.
Marathon: You Can Do It! by Jeff Galloway
Ultramarathon Man: Confessions of an All-Night Runner by Dean Karnazes
Racing Weight: How to Get Lean for Peak Performance by Matt Fitzgerald
RUN: The Mind-Body Method of Running by Feel by Matt Fitzgerald
Daniels' Running Formula - 2nd Edition by Jack Daniels, PhD
Road Runner Sports
Eastern Mountain Sports