Suggestions for a new Java-based MOO

Dan Hon asks: "A friend of mine is in the middle of writing a Java1.1 based MOO provisionally titled "m++". We're on the look out for new features that we could incorporate - really groundbreaking stuff that has been on peoples' wishlists, but hasn't been implemented yet. We've come up with a few cool ideas ourselves like transmitting sounds between rooms to a certain distance radius so you can hear "muffled" conversations, implementation of path objects between rooms so that locations can be "flooded" along the same lines of the sound transmission, and others. Does anyone have any other ideas? You can access the current status of the project at this location."