Not much to tell in this update since I was kinda busy with non work stuff ;-)
Chaos Communication Camp has a few mobile related talks: Applied Research on security of TETRA radio by Harald Welte, GPRS Intercept by Karsten Nohl, iOS application security by Ilja van Sprundel, Machine-to-machine (M2M) security by hunz, Open-source 4G radio by Alexander Chemeris, The blackbox in your phone (about SIM cards) by hunz and some more closely related talks. The camp talks look really good this year.
Defcon Cellular Privacy: A Forensic Analysis of Android Network Traffic by Eric Fulton, Seven Ways to Hang Yourself with Google Android by Jacob West and Yekaterina Tsipenyuk ONeil.
BruCon iOS Data Protection Internals (Andrey Belenko), Smart Phones - The Weak Link in the Security Chain (Nick Walker - tel0seh)