This article is obviously going for the shock factor (I tried to tone down the headline) but it seems like this guy has found some interesting vulnerabilities?
Hijacking airplanes with an Android phone
An extremely well attended talk by Hugo Teso, a security consultant at n.runs AG in Germany, about the completely realistic scenario of plane hijacking via a simple Android app has galvanized the crowd attending the Hack In The Box Conference in Amsterdam today.
http://www.net-security.org/secworld.php?id=14733
It's still curious to me how he thinks he can "hack"an FMS via ACARS or ADS-B... I sincerely hope that's hyperbole.