Of course that opens up at least 2 issues - "tampering" with scores might be even more of a concern. And you would have to cover for the possible and disastrous computer crash though I have used these devices for collecting a ton of field data over the past few years and have never had a glitch (despite pretty wet conditions and drops etc). I suppose you would want to also send out a standard paper scorecard with each group that is compared to the PDA at the end of the round.....Lots of things to work through initially but wow the possibilities are pretty huge. Real time scores for everyone starts to become very feasible.
Shoot if you set up one to read a pre-recorded message with sponsors and rules, then set a (2 minute) alarm on each PDA you could just get rid of the TD altogether!