I just booted from CD with
pfSense-20080812-0838.iso.gz from 12-Aug-2008 05:32 (1.2.1)
The Captive Portal is up and running.
753 ?? S 0:00.08 /usr/local/sbin/lighttpd -f /var/etc/lighty-webConfigurator.conf
882 ?? S 0:00.06 /usr/local/sbin/lighttpd -f /var/etc/lighty-CaptivePortal.conf
Clients can connect 'as before'.
Great work - thanks :)