I'll go first - never used to turn the 770 "off" (ie shut then reboot) but always thought putting the case on sent the unit to a sleep phase - how is that achieved with 800? when it "goes blank" after a while it's still connected to net etc when you tap screen. is there a sleep mode to save bat life without having to do full shutdownb (770 wsod occured to me after an over-anxious bout of rebooting - been rather timid of it ever since!)