I have looked all over Google and here, too but can't find out if dynamic pages like PopShops (PHP) should be included in your sitemaps. One site went from 80-some pages to 937 overnight when I changed the PopShops settings to make more pages. The GoldenCan feeds do the same thing. I don't like the idea of listing all those pages that are identical except for the products and don't contain any "nofollow" tags. Any insight?