Is there anyway to use Leopard's Automator application to process a .txt document containing a list of URLs (not feed URLs, but rather site URLs), and then somehow have it find out what each site's RSS feed is, and then return the results as a list of RSS Feeds (either in a simple list of, or as an opml file)?

If not, does anyone know of a website that might offer such a service? How about an application, or an applescript?

Any suggestions would be greatly appreciated... Thanks!