SwiftRiver is a free and open source software platform that uses a combination of algorithms and crowdsourced interaction to validate and filter news.
And they have a Drupal module: http://drupal.org/project/swiftriver
Could definitely be a complement to Visions Unite, it isn't a replacement, it uses user input but the focus is on automated filtering.
Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 3.0 Unported License.