I’m not happy with the JigLibX results, and I don’t see much active development on it. I’m looking at a couple of different physics library options. Right now I am evaluating PhysX (through the StillDesign C# wrapper). I also want to check out Havok.
Im sure it won’t be perfect (game physics is at best a black art!) but i’ve seen a few videos on youtube where PhysX looks great. And being owned(?) by Nvidia, its bound to be more actively developed and supported than ODE/JigLib/etc.