UPDATE 1/8/2013: Code now on github: http://github.com/joemcbride/HttpContrib
At MIX, Microsoft released Preview 4 of the WCF Web APIs. They also provided an updated Async CTP that brings async Task support to Windows Phone.
Thank you everyone for coming to my presentation, and thank you again to Telerik for having the webinar series! Here are the links from my slides and a download for my slides and demos.
Download: Windows Phone Push Notifications Slides & Demos
Push Recipe: http://joem.