I was at a coffeehouse yesterday and I observed the waiters with those PDA's. Once they switched them on, they could take an order, which implies that their PDA's wi-fi connection was enabled even when the device was in standby mode. A bit dissapointed that both my HTC Touch and my Mio P560 would turn off their wi-fi connection upon entering standby, I decided to get to the bottom of this. And I did!