>I'd recommend something like a Linux or BSD firewall
>with 3 NICs: one facing the outside world, one going
>to your internal LAN, and one connecting to your DMZ
>network containing your WiFi AP.  Then you can control
>what traffic WiFi users can get from your LAN or your
>ISP, and with what credentials.

This is essentially what I intend, using a mini-ITX board, Linux, USB
broadband modem, USB Wifi, and the on-board 10/100 for the in-house LAN. It
then becomes a case of determining how to restrict the Wifi access to those
I want to allow.

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