It's been a few years since I looked at UQBT and I'm sure when I last
looked at it, most of the papers associated with it were on commercial
servers and there was no source available. Well, at some point that
must have changed, because there's a 300+ page document online here:

http://www.experimentalstuff.com/Technologies/uqbt/uqbt.pdf

and the sources are here:

http://www.experimentalstuff.com/Technologies/uqbt/index.html

Has to be worth a careful read (esp for the Orion team)...

Also the related 'walkabout' project is at that same site:
http://www.experimentalstuff.com/Technologies/Walkabout/index.html


G