The BlackBerry PlayBook has been rooted, and here is the video to prove it. You can see a PlayBook with root access running in the video. The exploit was found by 3 guys named xpvqus, neuralic , and cmwdotme. Neuralic does the demo in the video and he sas while there is no official release of the exploit yet, one is apparently coming soon. He's even hopeful that they can get a full version of Android running on the PlayBook at some point.