Tucked down in a response to a Boing Boing article claiming that VE is just a Google Maps clone (while that might not be true, we all know that Google Earth is a ArcGlobe clone) is news that Microsoft will support Firefox really soon.
** Firefox users can’t view 3d maps yet, but an update in a couple of months should add this functionality.
Great news, but I’m pretty sure it will still be Windows only. For Windows users right now who want to use Firefox with Virtual Earth 3D all you have to do is install the Firefox extension IETab.
Spatially Adjusted 