Good design, and already have page rank "1". So it is good. One thing is, You main logo required Link of your home page. It will be better for visitor of your site to go back. Also add google map at "contact" page (last tab page of your site). It'll help you as Local SEO of your site. Give "mailto:" link for your "" email id placed at footer of your site.
The Layout is nice but you should go with a dot com site thats what i would do but yeah i like the green on your theme'
Very nice site and layount, can you use higher quality images on the rotating banner on the homepage? Also, the sidebar on the right side is very nice and I love the smiley face graphic.