Most games? I actually thought Freespace was more like an exception.
Many of the games I've played have had multiple controller support. Actually, most of them have it... tho only ones coming to my mind are X-Wing versus Tie Fighter, I-War and Freespace 1, 2 and Open...
For example, Il-2 Sturmovik (and Forgotten Battles and Pacific Fighters) at least has support for AT LEAST three controllers at any given time. It rules. I should get some pedals from somewhere, I think...
And, If I'm not gravely mistaken, on Microsoft Flight Simulator 2004 I could also use multiple sticks (I have two, I assigned the elevator trim onto other sticks throttle with great ease). I suspect that this applies to most other Flight Simulators too - and those rudder pedals, throttle levers and others from Saitek are probably primarily meant for flight simmers. Those fance X-52 extensions might not be usable in Freespace, but I still drool when I'm looking at them.
Heck, I can play Grand Prix 2 (with VDMSound) and THAT detects two joysticks... but on the other hand, that's an *old* game.
It would be nice to have two joysticks detected in Freespace, though.