While surfing around fourums this evening I picked up a tip for another useful SEM tool, Website Grader. It says this on the site;

"Website Grader is a free seo tool that measures the marketing effectiveness of a website. It provides a score that incorporates things like website traffic, SEO, social popularity and other technical factors. It also provides some basic advice on how the website can be improved from a marketing perspective."

Useful and nice tool, check it out.