NBC News Twitter Monitoring Drives Visual Navigation
Originally uploaded by robinhamman
This is pretty clever, although I'm told also simple to achieve.
NBC is monitoring twitter for a predefined set of Olympics related keywords. It scans twitter for those terms, tallies them up, then changes the size of the image related to that sport to depict the number of tweets.
The result is an attractive, and interesting, way to navigate the site and explore comments posted by others to twitter.