Dmitri gave a demo at Watson this summer; it was quite impressive.  If people happen to be at SPLASH in a few weeks; check out their tutorial or otherwise try to see a demo of the tool

All of the integration questions Erik raised are important.  

My own assessment is that getting it integrated and ported to Linux would be a huge productivity boost for people working with Jikes RVM.  So it is worth some time trying to figure out how to make it happen.