Don't underestimate the power of the source
Looks like all that GSM code-cracking is progressing faster than we thought. Soon after the discovery of the 64-bit A5/1 GSM encryption flaw last month, the geniuses at Israel's Weizmann Institute of Science went ahead and cracked the KASUMI system -- a 128-bit A5/3 algorithm implemented across 3G networks -- in less than two hours.
I totally called this one. Sometime later this year there is going to be a quiet panic about how exactly to deal with this problem, if that isn't already happening.
Perhaps one day listening in on cell phone frequencies will be as easy as it is to listen in to others conversations on a raido... or over WiFi.