[jamestalmage]

You can't ... (yet)!

The rotation code is actually done, you'll notice China is rotated when you first log on (as is the US just a little).

Creating sane UI for you to rotate countries yourselves (that works on top of google maps) is going to take us a while. But it's on the todo list after better State/Province data

[Aldo_MX]

No need for UI, just use the scroll wheel while dragging, or shift + scroll while the mouse is hovering a country.