I’ve spent a little too long reading forums and blogs recently– there’s a lot of good stuff out there.
First, a cool tool helping gamers find gamers: Findplay. Another: Frapper.
Backstory vs. Strong Character Creation is a good forum thread about how you can make a strong, interesting character without pages of backstory.
People and Props is a good discussion about when you should bother rolling dice in a dramatic game.
The PTA TV Guide is great way to show off lots of very cool actual play. Meg and Emily have started Fair Game, an interesting blog.
I doubt this is all I’ll add, but it is what I’d clipped to scribble about soon.
More: Mapmaker is a handy map making program, used in tonight’s session.
d20 Magazine Rack: GM’s Perspective is few years of articles with GMing advice. (Found via Treasure Tables, which is currently running “Blogging for GMs” for October.