GeoPlaces - This is a pretty cool app integrating several texhnologies - WPF/WCF/ADO/Virtual Earth API.
The source code is on code project - so get your hands dirty with this code :)
PingBack from http://asp-net-hosting.simplynetdev.com/geoplaces-wcfwpf-app/
is 'texhnologies' some new buzzword that i don't know about... or a typo? ;)