Site looks nice. I like the green. My site theme is green as well 😉 One suggestion I have would be to modify your top-nav to include a list of your categories. I think it would be more obvious that you are news style site. Right now I thought you might be a hosting company because all I saw was Home and About in the top nav.
You can do this by adding the following to your header, right after the call to wp_list_categories(). You may need to mess with the CSS to get it to look the same as the page links, though.
<?php wp_list_pages(‘sort_column=menu_order&title_li=’); ?>
You can add a depth parameter of &depth=1 if you only want to list the parent categories.