There is a solution for making the PlayBook lighter in spite of having additional weight as added by protected case, I just watched it from cartoon channel i.e. attach 5 balloons on it...
Are you guys nuts. I got mine in a incipio silicryc case and i barely know im holding it. I suggest working out a tiny bit a day if you think the playbook is heavy.
I have the mini-keyboard and 32 gif version with it's protective leather case and yes it's heavier than the PB out of the box, however, Arnold would say that only a girlie-girl (meow) would complain about such a load......