@tonyw
"If and when AOS 5 ever happens, we will get intent and the Tao JVM (which runs like lightning). However, until then, would a port of a JVM be A Good Thing?"
Sounds like a pretty monumental task. I'd be inclined to contact Ben Herman's directly and solicit his feedback. I have heard that a PPC-native version of Tao's engine is already available so that would be the next logical step to consider rather than reinventing the wheel.
Are you itching to do a port of a JVM in particular or simply something worthwhile? There are definitely a lot of alternative projects. How about considering Navigator? If nothing else it would be valuable to do some profiling to assess the feasibility.