I've been roleplaying for a long time, and done world building for almost as long. A year or two ago, I discovered blogs, or more specifically roleplaying blogs.
I do a lot of world building. I start with an idea, and then start working on it. Often I soon get another idea, and start working on that instead. My hard-disk is littered with the neglected corpses of past projects.
So I figured I'd start documenting my work online. Do one of those world-building blogs. I'll upload what I'm working on at the moment. And who knows. Maybe you'll like it.