Virtual Earth is looking to partner with state and local governments to share geospatial data, specifically aerial photography.
From their announcement:
Why should we publish our imagery in VE?
GoVE supports the data sharing goals of many public sector organizations by providing a free publishing service. Through GoVE, your taxpayer-funded information will be provided on a free, open access web site that benefits taxpayers, government officials, your corporate tax base, state and local governments, etc.
You can read more about it at the Virtual Earth blog.