I tried to fiddle with ODE some time ago, trying to make a top-down view car racing game, but I never got a good feel into it. But this time I’m going for tanks (and not a racing game :)), but how should I simulate the movement? Just applying a force in the direction of the tank (given it toches the ground?) might feel weird - and I get the feeling you have already thought about this for a bit, and I couldn’t find anything in the ODE mailing list (not a member, so I couldn’t search the whole archive), so a kick in my rear region in the right direction would really be helpful…
/M