Some tracks already offer mobile updates.
Deer Creek Speedway in Minnesota.
Track website: http://deercreekspeedway.com/index.htm

Tracks Mobile Update page: http://www.speednetdirect.com/mobile...p.php?tid=6114

I believe it is available to every track that uses Speednet Direct.

These are links to Indiana tracks using speednetdirect but they don't use the mobile lineup and results system. I would imagine it's something more the tracks would have to pay for which is why they choose not to use it... but that's just a guess.

Lincoln Park Speedway
http://www.speednetdirect.com/mobile....php?&tid=6133

Bloomington Speedway
http://www.speednetdirect.com/mobile...s.php?tid=8269

Lawrenceburg Speedway
http://www.speednetdirect.com/mobile...s.php?tid=8771

Paragon Speedway
http://www.speednetdirect.com/mobile...p.php?tid=8158

This could be very handy for competitors at the track. Imagine sitting in your pit and finding out where you start your heat race by looking it up on your mobile phone.