Quote: Originally Posted by
evandude 
I'm not personally aware of any; but then again I've never looked. but the idea raises some issues such as update rate, and position accuracy. IIRC, GPS receivers for the PC only update once a second, and position accuracy seems to be on the order of several meters. Considering the amount of money some people spend to shave tenths of a second from their 1/4 mile time, an accuracy of only around 1 second doesn't seem real great.
That would be an issue. I guess that is why the GPS standalone units that do this cost thousands.