Today at BlackBerry World 2011, Engadget got a hold of a demo of Android apps running natively on the BlackBerry PlayBook. Android's menu and home buttons are emulated using the standard PlayBook gestures, and the back button is replaced with an on-screen softkey. When the Android Player becomes available for the PlayBook, users will be able to download Android apps from BB App World. Also in the news of Android apps, the mobile device hit, Angry Birds, was announced to become available for the PlayBook as a native game - no strings attached!