It's time for a traditional most popular posts of 2010:
Creating a Splash Screen with a progress bar for WP7 applications.
Creating Scrollable TextBlock for WP7
Creating Progress Dialog for WP7.
Implementing Picker Box functionality on WP7
Creating List Picker for WP7.
Creating Image Round Button for WP7
Creating LINQ Data Provider for WP7
Deep Zoom on WP7
Happy New Year everybody! :)