Novus - 2:09 pm on Aug 8, 2011 (gmt 0)
Id say your first port of call would be webmaster tool see what WMT has to say. I notice your xml sitemap is not product level deep and your product pages are really light on content.
Googlebot is obviously not reaching your product pages if there not showing up, but that could also be content related too to be honest.
An idea might be to create some back links to a product from something like blogspot, see if the page will get indexed. I think you have a couple of issues to look at and you have some testing to do.
Secondly if you post in a more relavent palce you might get more response's