The PlayBook NDK 1.0 was released at BlackBerry DevCon Americas 2011 this week and with it comes the ability to create AIR Native Extensions. AIR Native Extensions is one of the big features available in AIR 3.0 on all other platforms. However, Native Extensions have been available in the AIR Runtime on the PlayBook since it launched. So when developing your application and your ANE, it is not necessary to target AIR 3.0. You can target AIR 2.7 and the BlackBerry Tablet OS 1.0.7 if you like.