Cool, works better than other services like this I've found. I tried it on Ars Technica's review of the Xoom tablet and it found all 10 pages. It didn't find the embedded video though. Also, all the formatting is stripped which makes it hard to differentiate section headers from content paragraphs, and all the images are in one list to the side, removed from their original context.
What I'd really love to see is a combination of the RSS API and the article API to produce full article RSS feeds for any site.