If you're interested in learning more about how Google retrieves and displays RSS/ATOM feeds that end up on personalized homepages, the folks in Mountain View have just posted an FAQ about what they call Google "FeedFetcher."
Feedfetcher is how Google grabs RSS or Atom feeds when users choose to add them to their Google homepage. Feedfetcher collects and periodically refreshes these user-initiated feeds, but does not index them in Google's search services (feeds only appear in our search results if they've been crawled by Googlebot).
Meet Your Favorite Search Engine Watch Contributors
Many of SEW's leading expert contributors will be at ClickZ Live, the new online and digital marketing event kicking off in New York (March 31-April 3). Hear from the likes of: Thom Craver, Josh Braaten, Lisa Barone, Simon Heseltine, Josh McCoy, Lisa Raehsler, Greg Jarboe, Dan Cristo, Joseph Kerschbaum, John Gagnon, Eric Enge and more!