This would be a shocking move. We already knew that RIM was planning to add a JVM to the PlayBook to enable legacy app support. But here's what BGR has been told:
[...] we have been told RIM is very much considering the Dalvik virtual machine, and we ultimately expect the company to chose Dalvik. If that sounds familiar to you, it’s because it’s the same VM that the Android OS uses, and it would allow RIM’s PlayBook and other QNX devices to run just about any application built for the Android platform.Possible scenarios include RIM adopting Dalvik, but not worrying, that RIM will enable Android apps on the device, or that RIM will go still further and work out a deal with Google that enables the PlayBook to provide official support for Android apps on RIM’s QNX-based OS, including the Android Market, Gmail, Google Maps, and so forth.
The obvious question is, if you're going to do that, why not just go all the way and use Android on BlackBerry devices? After all, native performance would definitely be better this way. Assuming this tip is true, at least RIM is looking at radical ideas. What comes of it, if anything, remains to be seen.