WCF ServiceHost access rights
The issue is that the URL is being blocked from being created by Windows.
Steps to fix: Run command prompt as an administrator. Add the URL to the ACL
netsh http add urlacl url=http://+:8000/ServiceModelSamples/Service user=mylocaluser
If you are running via the IDE, running as administrator should help. To do this locate the Visual Studio 2008/10 application icon, right click it and select "Run as administrator"