I am going to be trying out some GPS tracking kit at this weekend's trackday to see if it will map the racing line of the track (assuming I manage to find it). It will allow the car to be tracked online in realtime via a web page and give speed and other information. It was developed by my old boss and we are both keen to see how it performs at higher data rates. If possible I will post up a link to the page with a login and you'll be able to follow me round on the map ans track for the next few days!