I just updated my MVVM frameworks explorer Silverlight application. You can find the updated application here.

Here is the top 5 of MVVM frameworks supporting WPF, Silverlight and Windows Phone 7:

  1. MVVM Light (61k downloads)
  2. nRoute (19k downloads)
  3. Caliburn Micro (18k downloads)
  4. Simple MVVM toolkit (5k downloads)
  5. Catel (5k downloads)