I'm actually going to go against everyone else and suggest making it messier. I think with a site like this you actually benefit from having some ridiculous graphics, a la the million dollar homepage. Right now the site is difficult to read, but that's only because there is too much text too close together. The problem with super clean is that it gives the site an empty feel. Throw in a few gifs to give the site a little personality and it makes it feel like there's something going on. You can always clean it up later, like what Amazon and eBay have done recently and MySpace will probably do in the future. Some might argue that eBay should have been cleanly designed from the very beginning, but personally I think the initial garish layout probably helped it to gain traction.

The only trick is you still need a way to convey what the site is about, make it easy to navigate, and display whatever information the user needs to see on any given page.