Recently I spoke at the January 2011 meeting of the New York City Silverlight Meetup about my experience developing the TWiT application for Windows Phone 7. I spent time walking people through the phone tool experience, how I developed the TWiT application and the challenges that were faced and overcome.
During the talk I discussed tips, tricks, and "gotchas" every Windows Phone developer will want to know about. There was no code during this demo, but instead I focused on the process and important lessons which I think is more important. Anyone can learn to code, but getting an application to Marketplace is a lot more than simply writing C# and XAML.
Channel9 Presentation: http://channel9.msdn.com/posts/Developing-TWiTtv-for-Windows-Phone-7-From-Concept-to-Marketplace
Big thanks to my buddy Peter Laudati (DPE NY/NJ) who came up with the idea to record and made this get to Channel9.