Server plans and open life/open sim

We have been playing around a bit the last couple of weeks with both Open Life and Open Sim as an alternative to Second Life.
The advantages (typed on a train on a Monday morning) for us in using this are;
- Firstly and most importantly we have an aspergers/autism project coming up(which is not the same as this but will be related in many ways) - and there is no possible way we can be taking autistic 15 and 20 year olds into either Teen Second Life or the main Second Life without breaking their terms of service. For this reason a private grid is essential.
- Considering our previous attempt at this with Second Life (which cost a lot, was very frustrating and got us nowhere until we joined Skoolaborate) open source is very very attractive.
- Power to do what we want when we want, and not stress so much! Also the power to give each school it's own island to manage as they wish, without having to stress about what a conservative school overseas thinks. Private locked off environments have so many benefits.
- Cost - we are looking at the same cost for several open source islands as one second life island.
One issue educators face is the fact that they might want a space, but only for a couple of hours per week. Second Life charges on the basis that the space is yours and can be full of people all the time, but this is not what we need. Our setup will allow half a dozen or more island to be set up, with a limit of around 40 people. What this will mean is that many classes will be able to have ongoing spaces and activities within the world, but only a limited amount of people will be able to use it(our hope is around 40-50 or two classes).
- Research - and this is the real killer. If we are running our own world, then there is little we cannot monitor, at the moment in SL we are quite restricted. The TUG Engine will be making a start on many of these tools.
I am sure there are more, I will come back and post more about this after I have worked on a new proposal.
This project also needs a name!

For the server, at the moment we are looking at ozservers.com and most likely the Core 2 Duo E8400 (2x3.0Ghz) 6.0 Ghz option.