Hi all,
we have launched a GPRS module for Arduino. It includes the Hilo SAGEM communication.
The module is available and you can order it directly here:
http://www.libelium.com/tienda/catalog/product_info.php?cPath=21&products_id=59
As usual schematics and tutorials are available in SquidBee project page:
http://www.libelium.com/squidbee/index.php?title=New_GPRS_module_for_Arduino_(Hilo_-_Sagem)
Regards,
libelium