Additionally, the final documentation is now available on MSDN. See:
If you have used a previous version of the sample, you might need to deal with its remnants if you run into problems with this new version. Here are a few things you can try:
If you get a CookieException when accessing the remote services, try clearing your IE cookie cache.
If your application does not seem to be accessing the remote services, but everything looks properly configured, try deleting the application data folder. This folder location is indicated by the static Application.UserAppDataPath property - the default location for Vista is C:\Users\<username>\AppData\Roaming\MSIT.