I've been a subscriber to Bruce Schneier's CRYPTO-GRAM newsletter for more years than I care to recall, but the latest one included reference to Appfence.
http://appfence.org/
AppFence is a working prototype for those fancy new-fangled data-laden phones we run, although it only currently runs on Android as you need to flash your phone.
It's worth a peak and some monitoring to see where it leads imo.