I was waiting for the PDair case as well, but with no magnet to trip the standby mode, and a clasp that affixes *under* the unit (will not lay flat when closed, covers charging port), I've decided to...
It works for me... most of the time. Sometimes it or the 770 gets freaked out and automagically stops sending/receiving what I type. Then I get to disconnect/reconnect via the plugin to get it to...