I just released an implementation of the newest Virtual Earth on blawg.com today that mashes up all of the blawgers in the US and soon the world. In case you wondering a blawger is someone in the legal industry that blogs.
It has some cool balloons that pop up when you hover of the rss icons on the map that show information about that blawger.
The new version of virtual earth has really come a long way and has some really cool features that allow you to plot directions, Ajax callbacks, zooming, adding pushpins, etc. Check out the Virtual Earth SDK and play around with it when you have time. They have really good documentation and many features that make it fun to play around with.