This site (feed43.com) looks like it might be very popular. It's in beta right now and you need to be invited to test it out. What it does is allow you to create a feed from any website that doesn't already have feeds. So basically it's a screen scraper which turns the info into a feed you can read from your feed reader. What I see happening is webmasters scraping other sites for info they want and then using the feeds on their own sites. I don't know too much more about the app but I will surely give a try once they come out of beta.
