Here are a few nice Channel 9 videos on Windows Phone development. There are many more in this series on Channel 9. Enjoy!
- Introducing Windows Phone 8 Development Part 1
- Introducing Windows Phone 8 Development Part 2
- Designing Windows Phone 8 Apps
- Building Windows Phone 8 Apps
- Maps and Location in Windows Phone 8
- Windows Phone 8 and Windows 8 Cross Platform Development
Other Link Blogs
- Interesting Finds by Jason Haley
- The Dev Box by Janes Oosthuizen
- Dew Drop by Alvin Ashcraft