I actually like the large navigation buttons. Perfect for the concept of the site. If anything I would move them up closer to the banner and reduce the padding between them, there is just a little bit too much white space. In addition I would move the main content block up slightly - again for white space purposes and to eliminate some unneccessary vertical scrolling. Make sure you remember to style the submission form. Serif font are evil (most of the time). Also the form seems to flow outside of the main panel in IE and comes very close to it in FF. Adding a little more space at the bottom or reducing some of the whitespace at the top could fix this. Nice idea. Be interesting to see how much traffic you get. Good Luck :)