I have an ATI 9800 AGP card that has VGA, DVI, and S-video outputs. ATI 
sells DVI-to-VGA adaptors that apparently can be used to connect two 
VGA-compatible monitors for multi-head support.

Is this something that could be achieved with the standard Xorg radeon 
drivers, or is it something that would require proprietary drivers 
(which do not exist, of course)? I know multiple monitors are supported 
when they each have their own card, but I'm not sure if the two screens 
with one card idea will work.

Thanks for your help!