If I am reading it correctly you site currently has a PR4 which is pretty good. PR have has nothing to do with serps however.
The source code and where you are nesting head elements needs alot of work still. SEO is more like a art and most good webmasters pay no attention to all the seo advice out there. If you do you find yourself being confused. Instead use propper HTML syntax and propper formating.
TheGooner always give a very good review of the looks of the site and more. He is always honest at what he thinks and often cracks me up. I am more of a source code freak. Both matter if your page is ugly and hard to navigate through visitors will leave within 15 seconds. If your source code does not make sense the search engines will be reluctant to index your site.
There are commom rules that we all follow that remain true always. These are in my opinion:
Page title
keywords relevant to your content
URL that refelect you page title to some extent
Description of your site
Keywords however are becoming less important, Google pays no attention to them but Yahoo and MSN do. Optimizing sites takes a while, but if you end up being confused you can PM me. greek39