I though this was funny, Bla1ze over at CB spotted an image in an email ad sent out by MacMall. The ad shows the PlayBook running android OS. On a similar note I was at a local BestBuy not too long ago and the sales rep told me the PlayBook would RUN Android OS. I quickly corrected the associate. It is not to say that the PlayBook is not capable of running android OS but am not sure why RIM would ever do that specially with how awesome QNX is on the PlayBook.
So far RIM has made it clear that android apps will have to be submitted by developers through app world and RIM will have an android app Player on the PlayBook that will run the android apps. There is a difference in running applications than running a complete OS systems like android.