Just submitted this little app to the marketplace
The WP7 version uses Caliburn Micro which made writing it very fast without too much unnecessary code.
I’m also using RestSharpfor REST calls to Google’s API, which made the client API classes very small.

now I’m going to work on an Android version. so I’m looking for a good MVVM approach for that app as well(maybe Android Binding will do the trick).

Here are some screenshots


Update:
Here's a link to the website