Ever wanted to dive into coding for the Windows Phone 7 platform and needed a helping hand? Why not check out the WP7 wiki which targets experienced or newly acquainted Silverlight, WPF and WP7 developers? The wiki walks one through many sections covered, ranging from Silverlight controls to navigation and globalisation/localisation.
With the sheer number of resources publicly available today, it almost rivals iOS and many are arguing that WP7 has a more feature fluent process, which will be so should Xbox and WP7 come more integrated. Fancy looking through some quick pointers to refresh memory or receive aid in your "start out" phase of learning, head on over to the WP7Dev wiki for a gander.