I have used Live Maps for a long time now ... but they just keep adding awesome features!

http://virtualearth.spaces.live.com/blog/cns!2BBC66E99FDCDB98!14129.entry

Summary:

- Safari and IE8 compat
- Export your collections
- very cool new 3D improvements (see below)
- Labels in birds eye
- Party Maps
- Map cruncher integration
- Subscribe to a map and get notifications on people adding POI in those areas etc...?
- Hi-Def tour movies
- Traffic enhancements