is already used in Dakar, ASO is working with these guys.
They only use it so far for support and orga roadbooks, but FIM CCRR committee is seriously thinking of it for the short future to be used officially.
Organizers of major Rallies (WCH races, Dakar) as FIM guys told me, push hard for it since to be honest it cuts a serious part of a rally budget (printing) makes daily changes on roadbook piece of cake especially for a rally that is in the middle of nowhere and can combine some xtra features in one box (like RF sensor for CPs, GPS etc).
Actually trippy people have a special box for dakar and they have already provided to ASO special tools for their own roadbook procedure (scouting, designing etc).
They also include some nice software which can edit or create tracks and roadbook (very similar to Mike;s navigator concept) using vector maps while a google earth plug in should be easy.
I am using it for 3 years while scouting and this year Hellas rally will have a special class for it with 5-6 bikers who asked for it.
It has, trip master, cap repeater and compass, digital roadbook, gps nav, gps plotter, accepts vector maps etc.
all of it for a cost lower than a full equipped cockpit.
Still doing rallies with a paper roadbook is like cooking your own food rather than put a box in the microwave oven.
But be ure that this is the short future for most of the major races, especially desert ones.