Check out the new Bing Maps Beta!  It leverages the power of Silverlight to provide a lot of exciting new features including Streetside, Enhanced Bird’s Eye, and Photosynth integration!  Here are some screenshots:

Bing Maps Beta - Streetside

Bing Maps Beta - Enhanced Birdseye

Bing Maps Beta - Photosynth

These are just some of the new features. Check out Chris Pendleton’s blog post for more details on the features. Have fun!