I was excited for this new control, but it doesn't seem to work. Our users want to tab into the field and enter a date, thereby avoiding the mouse completely. On a newly placed control, within DateInput, set properties DateFormat and DisplayDateFormat to "MM/yyyy" since we never want to see month spelled out.
Run it, type 11/06 and tab out -- it shows 11/2011, the wrong year.
Now try 5/08 and tab out -- it shows 05/2011, also the wrong year.
This seems very basic, so I'm hoping I'm missing some setting to make it work as one would expect for a MonthYearPicker control.