Jonathan,
Thanks for your reply.
I tried your above mods but X still gets tha same messages (No devices
detected). From everything I have read, the "SubSection extmod" line
will load the extmod module but omit the DGA extension, but I tried
adding a Load "extmod" anyways.
I even tried the xorg.conf generated by fglrxconfig. The results were
the same messages in the Xorg.0.log file. As soon as I changed the
driver to "radeon", X started right up (without acccelerated
graphics). It's as if X cannot find/understand the loaded fglrx
kernel module.