Jarbo, a squadie of mine was recently in Texas, and decided to offer to buy drinks to HiTech and company. He asked this very question, and HiTech (or was it Pyro...don't recall) said he'd leave it for the time being. He said something to the effect that there were few places it really made any difference, and climbing UP the hill was such a pain that it was small consolation. Finally, he said it was "just too damn much fun racing down that hill from 56 to 27."
Personally, I'd like to see the introduction of roads, where the effect would be to allow faster travel for armor than is possible off-road. Likewise, the off-road max speed should be a function of the texture mapping of the terrain you're on. Light green would be grasslands, where fast travel was possible. At the other end of the spectrum would be dark green (wooded area) or gray (broken, rocky ground) where your max speed might be only 10 mph. It could be modeled as drag is on aircraft.
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Sabre, a.k.a. Rojo
(S-2, The Buccaneers)
[This message has been edited by Rojo (edited 06-08-2000).]