You might want to try MetaMedic [http://www.northernwebs.com/set/setsimjr.html] (scroll waaaay down to the bottom). It'll rank your meta tags and let you know how you're doing - word duplication wise as well as getting the most bang for your meta word/description buck. I believe they also have a paying service as well.

cfn ... Jen

Jen Worden
Web Developer
www.meadoworks.com