I'd love to add a Rate Product tool like this to my site, http://bowling-rockabilly-shirts.com
I like the simplicity of Amazon.com's rating application, and would like to implement something like that.

Are there some other sites that use StarRate Pro that I can check out for more examples?

Thank you

See here for example:
http://www.libhumanitas.ro/product.php/Povesti-de- dragoste-la-prima-vedere/8989/

even if is not in english, you will see.