http://blogs.msdn.com/jhawk/archive/2006/03/26/561658.aspx
A more complex Virtual Earth sample by Atlas architect Jonathan Hawkins.
http://msdn.microsoft.com/mappoint
The Microsoft MapPoint Developer Center includes downloads and documentation regarding Virtual Earth.
http://www.programmableweb.com/tag/mapping
A list maintained by Programmable Web of the growing number of map mashups; a majority of the mashups listed on the site make use of the Google Maps APIs.