According to the Kickstarter (http://www.kickstarter.com/projects/105 ... -bikespike
) it needs a data connection as well as certification to use Mobile networks to transmit the GPS data to BikeSpike's servers, which BikeSpike would provide as a service subscription cost. And would only support the US initially.. I think their reach goals was for the EU, then Canada/AUS/Sth America.. they only reached their goal for US coverage.
Nice idea as a layer of security.