I'll be doing a webinar on Tuesday February 28th on Building a User Interface in Mono for Android.  A little bit about this:

We will look at the basics of building a user interface for Android with Mono for Android. The user interface is typically the first thing that a user sees when they work with your application. They will often judge your application based on the user interface. We will examine the basic concepts of UI design with mobile devices, the Android XML based layout language, some of the UI design surfaces for Android, some basic Android controls and finally some suggestions on creating a successful Android User Interface.