To those who came out to see my presentation either in person or online (and stuck out till after all the raffle prizes :-), thanks! I had a blast doing the presentation.
As promised here is the slide deck:
Download the source code from the app I built. Note: You will need the v2.2beta or later version of the ArcGIS API for Silverlight/WPF and Windows Phone to build this. Download is free, but you will need to register for an Esri account to download it (also free). You can get get these bits here: https://betacommunity.esri.com/