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! :)