I understand that dual monitor modes are considered surround gaming, right?
I'd like to see these additions to the wiki (my short descriptions):
http://www.webpark.sk/fourtytwo/dual_multi_monitor_game_tips.htm
Civilization III
supports dual (or multiple) monitor mode in horizontal/vertical span (on both NVIDIA & ATI). See my description.
TOCA Race Driver 3
no wiki at all?!?! True - this game does supports "wide" range of widescreen modes out of the box, but nobody mentions that it also sports a dual monitor possibility.
See my description.
Need For Speed (Underground, Underground 2, Carbon)
The UniWS supports NFS UG and NFS UG2 and they are not even in your wiki :(
Additionally NFS Carbon reportedly can be patched the same way as NFS UG2. See my description.
All three thus support dual monitor mode when the graphic card is set to horizontal span modes. See my description.
Collin McRae Rally 2005
Fully capable of surround gaming!!! and again not even an article in the wiki at least there is a widescreen mode description on the forums.
But c'mon the crowds have the right to know this one :) See my description.
Homeworld 2
This is a true gem which also fully supports dual monitoring (which isn't for this game so far from widescreen modes).
See... ah you know.
OpenTTD (Open Transport Tycoon Deluxe)
This may be nitpicking but this also supports multiple monitors easily
See...
I can gladly provide more info on the subject of the above, I hope I have not sounded like a prick here but I really like to see this information made more public.
Please, please add that info or include me in the chosen ones (Insiders). I can put it up my self (with carefull deliberation and your blessing of course).