I'll be checking out JavaODE soon.. I am real interested in being able to use the new QuickStep solver that was added to ODE in CVS by Russ Smith recently.
How difficult is it to update JavaODE for QuickStep?
Yes, I've seen the performance, for games this means an
huge speed improvement.
I'd expect adding latest ODE (CVS Head) to Odejava takes less than one working day. Using Swig makes things considerably easy. This CVS Head should be for testing only at least for some time before it get's more mature.
Again, have to check my calendar

when I can add latest ODE to Odejava..