Laptimers ?
 

Does any of you use laptimers ?
I just bought one at last track event and it worked flawlessly every lap.
Its a simple unit that can record up to 99 laps in each of 99 available sessions. Price, including transmitter and receiver/display was $150.
Here is more info:
http://users.volja.net/tomazke/index.htm

You can contact me if you have any questions or would like to buy it also ;)

Track I'm usually at has a permanent system so you just have to carry a transponder.

Correct, an AMB transponder to be exact. ;)