This seriously sucks. I called technical support and they told me the same. I've tried one undelete program on my pc but it would not even detect playbook. I am guessing this is another security feature. I am not sure if i should be or .
I too accidentally deleted a wallpapers folder I had made with a bunch of cool walls I also tried the recovery program but it wouldn't detect the playbook either I had to download the wallpapers again.