Good job Josh updating us. This was very useful. I don't see many enterprises using PSK however and I agree with your assessment. Many SOHO networks use WPA with PSK but few have the skills to install higher level authentication with RADIUS servers and the like. A big problem still is the lack of 802.1x in the general enterprise network. Many times you can go to a corporate site and plug in an ethernet cable into an open port and get a connection. Not very good port access control at the basic level.