Indeed loginGrid GAS may help although I think in our own project track I could point out a little more.
One of the things that LL does well that we are yet to attack in the project is the delivery of the scene. I'm not so much talking about how well they send it to you or congestion but the method.
Giving you what you need to see when you're facing that way, texture layering, u touch and object and it gives it greater priority etc.
From my understanding so far, the streaming delivery of the scene on a whole is more efficient that if all textures for examples were urls pulled in from different places. Getting intelligent priority based on user activity is probably another one.Then I guess there's a rather large swift of other factors to consider, IP, security, implementation of DRM?
Internally we've talked a bit about peer-to-peer but have yet been able to come up with 'enough' positives to decide to implement. But discussion is a good thing :)
I'd write more but I'm a little pressed on time atm.
Sakai Openlife