Those IBM boxes sound magic - presumably they'll be completely tamper proof so they always give 100% true readings and never let someone speed while a bit of it is disconnected
I can already see the lines of "black box" hackers gearing up to let people drive at 160+ and have the box list it as 30...
Of course, IBM won't mind since they'll then be able to make a pile of extra cash fighting/chasing them. Who needs to forge money when you can rake it in with junk like this??