J'Kla, about building our own engine to run Uru content on...
I am working on such a program. http://lontahv.googlepages.com/PlasmaVi ... t28.08.jpg
That is a pic of it from a while ago. It's much more than a viewer now. I have a control system that would make turning it multi-player fairly easy. I'm working on integrating ODE into it for Physics.
My plan is: build a regular engine (not like Plasma) that is designed to run Plasma content.
The reason I haven't talked a lot about it is because I don't want lots of people bugging me and trying to be devs. I can't deal with having a team for this for now. I'd rather work the the engine than have to coordinate other (possibly without the same vision of the end program) people.
This uses libPlasma which means any PRP from any game can be viewed on it.
EDIT: to give you a taste of the real thing I have a windows binary here http://lontahv.googlepages.com/PlasmaVi ... .29.08.zip . I've disabled the Spawn-point stuff is disabled for now to you'll be spawned at 0,0,0 (or somewhere near there--don't remember if it's set to exactly there) this is intentional.
The consoles and stuff can't do much yet (or at least not anything too interesting for anyone except myself). You'll see instructions printed out of the terminal window when you start it up. To load a .prp or .age file: drag it to the viewer exe.
Note: Just clicking on the program won't be enough. You NEED to drag a prp or age file to it.
This can also work on Linux even though a Linux build hasn't been made recently.