As a distro maintainer nothing has frustrated me as much as this little application firstboot. Well, I am very pleased to say I have whacked it!
Foresight has replaced firstboot with a combination of autoconfig (modified from knoppix) and firstrun. Autoconfig configures Xorg on boot and firstrun creates the first user and adds them to the wheel group.
Downloads available in the usual places, http://www.foresightlinux.org/downloads/.