Tipping Point's Zero Day Initiative sponsored the Pwn2Own hacking contest for the 3rd time at the CanSecWest Security Conference. The results for mobile were ziltch, zip, zero.
Hackers were unable crack into mobile devices and didn't win $10,000 and the actual devices along with one year of phone service.
The Tipping Point Twitter site wrote it this way, "#cansecwest pwn2own is officially over- and all the mobile phones survived... until next year ;-)"
The Pwn2Own blog suggests that mobile devices research is still too new to find vulnerabilities. The mobile platform is limited by both
memory and processing power. What that generally amounts to is that the
vulnerabilities do exist, but actually exploiting them is complicated
and unpredictable. A lack of known debuggers for many of the platforms adds
limitations.