The beautiful MVVM
Getting Started with MVVM in 10 minutes
Building a Reusable ICommand implementation for Windows Phone MVVM apps
Laurent Bugnion, leads the MVVM Light Toolkit project, has a 4-article MSDN series on MVVM
Messenger and View Services in MVVM
Maximizing the Visual Designer's Usage with Design-Time Data
Commands, RelayCommands and EventToCommand
And finally, more videos:
Designing Awesome XAML apps for Windows 8 and Windows Phone 8 (Build 2012)
Create Cross-Platform Apps using Portable Class Libraries (Build 2012)
Understanding the Model-View-ViewModel pattern (MIX10)
Namoskar!!!