Just a reminder... and an excuse to link to @CheeseBaron's blog again.
If you are writing custom Views in your Mono for Android MvvmCross apps, then you don't have to use xml like: myNamespace.App.Controls.controlname
Instead you can declare an abbreviation like: foo
Which then allows you to write abbreviations like: foo.controlname
For a full description: http://blog.ostebaronen.dk/2012/12/adding-view-namespace-abbreviations-in.html