For those of you just getting started in windows Phone 7 development the Windows Phone 7 Jump Start training is the perfect way to make the rubber meet the road:

 

http://channel9.msdn.com/posts/egibson/Windows-Phone-7-Jump-Start-Session-1-of-12-Introduction/

 

Written by Andy Wigley and Rob Miles (of XNA Game Programming book fame) this tutorial is a fun introduction to the platform starting with Silverlight and XNA, then evolving into advanced application development for the Windows Phone.  These are all posted as videos on Channel 9 for your viewing and learning pleasure.

 

Enjoy!