U.S.News & World Report
"Articles from the last 14 days are free. Archived articles may be purchased for as little as $1.99." [Recently approved feeds from Syndic8.com]
Check it out - U.S. News hops the RSS gravy train! They even have the white-on-orange XML button on the page (bottom right-hand side) with a what is this link!
"This button () links to our weekly RSS feed. RSS stands for 'Really Simple Syndication,' an XML-based format for distributing links to our latest stories. Usnews.com updates the RSS feed on Saturday afternoons (EST) with links and descriptions for each of the stories from our most recent issue. We also offer exclusive web-only content, which we add to the feed as soon as it becomes available online. We encourage you to use this feed for your own use, but we do not allow re-posting of our full-text stories."
One note, though - you can probably get older articles for free from your local library. Great to see another major publisher coming on board!