I've just had a quick play with Yahoo Pipes and first impression was favourable, though now I'm waiting for more functions to become available as the current set has many limitations. At the moment its main strength seems to be to take content from one rss feed and create another rss feed based on different content with the same context.
The content analysis can be a a bit sketchy at times, often taking the news source as the context rather than the actual contents of the post and the location extractor seems to be only USA based. Hey, it's still in beta and early days, can't wait to see how this one pans out.
RSS Feed of Google news with Wikipedia and Youtube links
RSS feed of BBC news with products "related" to the news item from Google Base
RSS feed of articles, products and images based on the current BBC news