Virtual Earth API

MSR MapCruncher announces Have you ever looked at satellite photos of a building in Virtual Earth -- and wished you could zoom right in and see its floorplan? Have you ever used VE to plan a trip across town -- and wanted to seamlessly switch from its road maps to maps of bicycle trails, bus routes, or carpool lanes? Have you ever wanted to create and publish your own map mashups -- and wished you had a tool to make it easy to integrate a map you care about into Virtual Earth? Microsoft Research has made this a reality!

This is an interesting API. I can think of several interesting applications to do with either this, or a similar API with Google Earth.