I've posted the slide deck and demo code from my user group presentation the other night. You can download it from my VBMobile blog: http://ilovevb.net/Web/files/folders/vbmobile/entry132.aspx
The demo code shows basic SMS Messaging, State & Notifications Broker, Call Blocking (using the State and Notifications Broker) and using System Settings - all in VB.NET.
Enjoy!