I created it mostly to find beautiful code, not because I have a whole library of it. Because of that I couldn't really seed it properly. If you have anything to contribute, please do.
Well, sometimes I stumble upon code which I really think is very nice. Sometimes I'm also a bit proud of my own code when I read it a few months/years later but I'm not sure if that is maybe too biased (and also I'm not sure if I could point out any specific examples right now -- but I will keep your site in mind).
I also remember some talk on the Chaos Communication Congress about interesting code examples. That was both about very crazy hacks (mostly like 'don't do it at home' but still insightful) and also some very nice examples. I'll see if I can find that talk. (Or maybe someone remembers it?)