I have now uploaded a series of Revit 2013 commands and shortcuts and for this release I have split the command sheets into Architecture, Structure and Systems. These are available for download populated with the standard short cut keys that are included with Revit 2013.
Here are the links to the PDF files. I have also identified new Revit 2013 commands with a light green fill.
Structure Tab : Revit 2013 Commands and Shortcuts – Structure Tab
Systems Tab : Revit 2013 Commands and Shortcuts – Systems Tab
Architecture Tab : Revit 2013 Commands and Shortcuts – Architecture Tab
I am also working on a Revit 2013 Quick Reference Card which I will make available in the near future.