I've obtained an Remote Telemetry and Control Unit from Logic IO and I'll be playing with it in next few days/weeks. The RTCU DX4 pro is an GPRS-enabled control model for remote telemetry. The module is equipped with many cool functionalities (like iButton support) and several analog and digital IOs. It is programmed in some pseudo-pascal language and configured via USB. So stay tuned and wait for first effects.