Following on from a StackOverflow question a couple of days ago, eMi- has released a new repo - https://github.com/eMi-/mvvmcross_datepicker_timepicker/
This provides the custom Droid View classes and all the instructions you need to use the code.
It's awesome - and its Creative Commons licensed to it can be included in v3 :)
A pleasure to award Badge of Awesomeness Number #12 to eMi-
P.S. Yes, he really is that young and yes, I really do feel that old now!