If youre interested in Beta OS’s then you might be interested in this OS too.
RIM has given developers OS 188.8.131.520 to play around with.
This OS is only for developers and will have an insane amount of bugs, but if you want to get slightly adventurous then go ahead and get youreself registered and download this OS for youre PlayBook.
But just always remember, backup youre PlayBook before the update and make sure to be ready for a lot of bugs.
Let us know if you will be downloading this OS for yorue PlayBook.