I'd like to recommend a couple of blogs. Both are by freelancers who have written for GURPS.
This is Douglas Cole's blog. Doug is probably most (in)famous for his article, "The Deadly Spring" in Pyramid magazine. It's reviewed here.
At least at the moment, it's got only a few articles, but they are good ones:
- One on toting 10' polearms (and poles) in a dungeon.
- Two on a variation how GURPS figures damage from weapons (amongst other things.)
- Some retrospective on why he writes what he wrote.
tetsujin no llama
The other blog is by Matt Riggsby, who has written so many things I can't keep track of them all. The first DF adventure being one of them.
His blog is a bit sparse on GURPS rules right now but it's got a lot of details on his own world. There are a lot of little bits you can steal from his musings to fit into your own game world. Plus, it's just a good read.
Both really interesting blogs so far.