Research in Motion has made BlackBerry PlayBook OS Beta available to developers, or, really, any BlackBerry PlayBook owner that wants to download it.

BlackBerry PlayBook OS Beta features include:

  • Runtime for Android apps
  • Adobe AIR 2.x
  • WebWorks
  • Native API 2.x

You do have to jump through a little hoop and register your BlackBerry PlayBook for Beta access before you can download the latest OS, however, doing so is a straight forward process that can be done here