If you don’t use the Google Toolbar, but would like to know your site’s PageRank value, here’s a tool that will do the trick. PageRank Lookup – SEO Tools – Search Engine Optimization, Google Optimization. PageRank reflects both your website’s popularity, but also the “worthiness” of the sites that link to your site. A high-quality site linking to your site can increase your PageRank value.
I picked up this tool from a tip on Entrepreneur’s Journey which has this good article about PageRank as well as all sorts of SEO information.