Looks pretty good. The design is clean and simple to understand. I first thought "submissionworld" was going to be about submissive people and submission fetish. The logo looks like recycling symbol. On the individual pages with the screen shots, the star rating javascript seems to be displayed over the title text which looks very strange. I would make the navigation pieces at the top as full buttons or at least make the clickable area a bigger space. It's a bit strange to try to click on such a wide space for a small text on the menu, because my first thought is that the whole area is clickable, but it is not. I also have no idea why you concatenate the words "user" and "online" everywhere. It would make more sense as "Users Online". Anyways, good job on the site.
I see you used website directory for a density of 18.2% in your title but only .6 percent on the page. 0% percent in your description, keywords, headings, links and bold. You need to give the spiders something to work with.