FYI there is another basic style that is installed automatically called subsilver. So for those who want to try it go to the user control panel and click on the board preferences and change it there.
If you want to see other styles that exist you can go to http://www.phpbb.com/styles/demo/3.0/
and in the bat at the top of the page there is a select style box, you can change it to try a different look. If you see one that interests you post the request here and we will see what kind of feedback we get.
If enough people show interest I will install it, but I am not installing and maintain an overlay style for 1 or 2 people