Since Google doesn't offer an "official" RSS (or ATOM) feed for their Google Zeitgeist rankings of popular search terms, Kunal Anand decided to create one using a "screen scraper" he built with Perl code. Here's a link to the GZeitgeist feed along with some technical details posted on Kunal's blog. On Searchblog, JB wonders if the feed will be around for long since it's a screen scrape.
On a related note, the Yahoo Buzz Index of popular search terms offers a number of "official" RSS feeds.
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!