The front page is, for some reason, very laggy. Perhaps scripts you are running, perhaps the multitude of sites that are being linked in.
Trying to load or refresh the main page, takes me 5 seconds, then another 3 or 4 seconds of the screen being frozen as twitter, reddit, and so forth wait to load. Perhaps put those things below the fold instead of on the front page? or perhaps put them serverside with a redirect to the actual links?
10 seconds may not seem like alot to wait for a page to load, but that is enough to make some one frustrated to browse a page and go elsewhere.