I was wondering if it is possible to create a virtual "screen" within SL. This screen would act as a secondary display for the computer and would be able to have interactions with the computer while still running the game. I have actually been able to do this within the game Sauerbraten. Through a sires of codes, i was able to make a texture that would be continously updated as well as sending information back to the main computer. I even got it to the point where i was able to run CSS within sauerbraten, no easy task if your using a mac for it. I was able to run everything at almost full speed within this virtual screen because i set it so 2 cores worked on the virtual screen and its prosesses and the other 2 cores worked for sauerbraten. I also set it so 2 graphics cards worked for each of these items. and each could use up to 8gb of ram. The game sauerbraten is actually a first person shooter but because it is based on a simple cube building system and came with an xcode package, i was able to extend it. The only problem was that it crippeled everyone elses computers when they tried to run it and required at least 2gb of ram, really not that much but many people dont have it, and only worked on a mac with a newer video card.
Second life seems like a much more practicle game for this but i am not sure if it could be done.