Bing Maps is often used by third-party websites who need mapping functions for their various features. Many of these sites started using Bing Maps when it was known as Microsoft Virtual Earth.
Weather.com was one such site. Now, they're innovating with Bing Maps. They've added a new feature called "Futures." This helps visitors to the site see where Weather.com predicts various weather elements may be heading.
Another third-party entity to incorporate Bing Maps is National Geographic. The famed magazine has digitized every issue in 120 years worth of archives and placing it in a 6 DVD set and external hard drive. Bing Maps will let you GeoBrowse the world to find articles relevant to a specific location.