Guy,
I am aware arduino can be used in conjunction with other detector types, but I'm thinking it should be a detector type in it's own right,
and potentially support multiple arduinos for primarily
1) Start/Finish - Lap Detection
2) Dedicated Pit In
3) Dedciated Pit Out
4) Driver Stations - so those of us with advanced arduino skills, can build driver stations to display data via hardware using the arduino protocol, like logging in as a driver via RFID etc.
What do you think?