I find this to be an affront to engineers and designers. It trivializes the amount of time and effort it takes to make a well engineered product.
Can someone elucidate why it might be important for Facebook to have it's own hardware? Why wouldn't apps on an Android or iOS or Windows Phone be good enough (of course with seamless integration like Twitter on iOS)?
P.S. With Facebook's current alliance with MS, doesn't Windows Phone make for a good platform to build upon. Note, I believe that Windows Phone will eventually take off.