Brian Flood has a detailed post describing some of the new features of the latest Arc2Earth beta where it can embed Virtual Earth’s 3D globe in ArcMap. Now Arc2Earth has benefits beyond just creating web mapping from ArcGIS, but creating layouts that include 3D views (check out this screen shot to see what this means). I know a ton of my friends who do cartography with ArcMap are excited right now. We’ll have to see what folks start doing with this new ability to produce 3D maps with ArcMap.