Hi everyone - I searched the forums and only found 1 thread on this that didn't necessarily answer my question. I like to use my iPad 2 without a case, and I like to be able to rest it on my knee as I cross my legs and read. Problem is, the back is slippery and it slides off of my knee. Does anyone know of a well-produced rubbery-grippy sticker that I can put on the back of my iPad that will make it less slippery? I checked out the SGP Skin Guard and that's close, but I'm wondering if there's anything out there that is a bit more rubbery. Also, preferably it would come off cleanly, as I am going to need to re-sell this iPad once the IP3 comes out in a few months. Thanks in advance.