Sagem Orga: SIMFi, SIM with WiFi

Sagem Orga and Telefonica developed SIMFi, a SIM card that takes cellular signals and pumps it out as WiFi. What this means is that your GSM mobile phone can be used as a mobile WiFi hotspot where you can connect authenticated notebooks and other portable gadgets. This is a fantastic idea and would make MiFi and the like obsolete. I have two concerns: battery life and EM radiation (read Cell Phone: Health Hazard?). Source: Sagem Orga via Engadget