No modules besides the intro adventure yet. There are some adventures for the old 1e Thieves' World you can still find online though. Some like them, some don't, I personally enjoyed most of them.
I thought Thieves' World was one of the best d20 books I've read in a long time and have run a great mini-campaign for it that my players are dying to get back to.
You can adjust the power of magic, allowing you to run the game as a low or medium magic game.
It's also got some nice classes, and a background system (it's basically human only race-wise).
In short, a really solid d20 fantasy campaign and a lot of good crunch.