JaJah quietly launched a few days ago a new service called “GoJaJah” currently only limited to bearers of an italian mobile.
The service basically uses the Funambol technology (SyncML solution provider) to synchronize your address book to the GoJajah backend, detects your current location and adds to each of your contacts calling cards the appropriate local Jajah VoIP phone number making it a real no-brainer to use Jajah service in the smartest possible way (and letting you save money on long-distance calls).
This is probably the most impressive use-case of address book synchronization and enrichment – watch out as the service goes mainstream !