I guess it's a question of how complex the physics needs to be. What kind of game is it? What physics objects do you need? What kind of joints do you need?
You could maybe try PhysX or Bullet or Havok. Not sure which have wrappers for each platform but if TGC are talking about using Bullet there's a good chance it is available on all platforms.
If you can get away with it use 2D physics, if not it will have to be one of the others really. Matty H did a good PhysX library for DBPro, might be worth asking his advice?
oct(31) = dec(25)