It's funny I found out about geeklist much after I first made Swym. I think it's an awesome site, but I have a slightly different take. Firstly, although the initial seed of my users is programmers, I want to keep open to all sorts of creative people. In fact, that's very important to me. I explain why in this article - http://swym.me/story
Also, I want to focus on the simple tagged browsing approach because it's fun and enables serendipity.