@kpa:
As I understand it, in order to use authentication, I cannot use an external wireless AP (such as WRT54G) because that won't pass the MAC address of the client PC thru to pfSense to use for the authentication.
Yes you can as long as the wireless AP operates as a bridge between wireless and wired networks and does not do any routing.
Thanks for the reply! Thanks to you I've got it working in a "simulation mode" with another router connected as the WAN providing an "up" connection with DHCP, etc., and two laptops entering through the wireless into the LAN side. Captive Portal catches the laptops, then allows them through to that fake WAN after authenticating. It all seems to work smoothly, so I expect it to do so when I hook up the real WAN.
I thought I had heard or read somewhere that the MAC wouldn't be passed thru the wireless, but it would make sense that that would be the case only if the wireless was handling DHCP, routing, etc. As you said, it does seem to work with the wireless serving as a "dumb" AP bridge to the LAN and nothing more. I guess I had a "mental block" about the MAC so I foolishly didn't look into it further.
Thanks again!!