I'm curious about the wifi tethering. Ad-hoc wifi networks created on a Mac are only WEP-"protected"; I wonder if the iPhone's is a true WPA(2) access point. I

I'm curious about the wifi tethering. Ad-hoc wifi networks created on a Mac are only WEP-"protected"; I wonder if the iPhone's is a true WPA(2) access point. I wouldn't be comfortable walking around with an effectively wide-open WEP AP attached to my mobile data connection. I also wouldn't be too presumptuous about getting the AP feature in previous hardware, if it is a true access point - 'master' mode isn't supported by all wifi hardware, although it may well purely be a firmware ("baseband") issue. I don't expect to get the feature on my old iPhone 3G, though it would be a nice bonus on the iPad.