This probably isn't as fancy as you want, but there are ways to combine multiple RSS feeds into a single feed (eg. Google Reader). Then publish that aggregate feed and monitor it with the "Chumby RSS Reader" widget (under the News category). I just tried it and it works.
So all you have to do is find the RSS feeds of the information you're interested in and pull them together in Google Reader.
Here are a few aggregate feeds I created for a group that I manage:
"tech-news" via Canadian Techies
http://www.google.com/reader/public/atom/user/02145095643734265253/label/tech-news
"tech-blogs" via Canadian Techies
http://www.google.com/reader/public/atom/user/02145095643734265253/label/tech-blogs
"mixed-bag" via Canadian Techies
http://www.google.com/reader/public/atom/user/02145095643734265253/label/mixed-bag