Don't know if everyone has seen this already, but thought people might be interested.
There's a scheme set up for child abduction cases, where not only TV and radio shows are interrupted to spread the word quickly (as happens in the States) but also SMSes sent out to registered phones in the near vicinity of the incident.
Anyway, I thought I'd link the two sites in case anyone wants to find out more:
Child Rescue Alert
and, for registering your mobile details:
Community Alerts
I've registered - just seemed like a good idea to be an extra pair of eyes...