Thanks for that. Yes, I'm a little sad a lot of the VRI stuff has a bit of "abandonware" feel -- I suppose they view it at just some (half-silly) proof-of-concept code, but I think a lot of this stuff could be really useful right now.

I really wish they'd taken the time to package it up, and license it under some Free licence -- I'd hate for this stuff that doesn't seem to require anything in the way of special hardware -- languish and disappear in a similar way to Smalltalk -- for no good reason.