Thanks to Chris Thorne I found the OpenSim project. There is a great promise in this project as there are major corporations behind it and they all have ambitious plans for the future of virtual environments. It is an open source virtual world server written with C#. The server functions with the open source SecondLife client and there are tens of grids in the grid list. Grid is a synonym for cluster or network of servers forming together a virtual world. I want to contribute to the effort myself with a node or two. Now now, which grid to choose?
The functional clients seem to be branches from the open source SecondLife client and as such have the same glitches and usability problems. It would be great to see a bravely redesigned client with good usability and smooth functionality. SecondLife and the OpenSim clients remind me of the good old rule: "Prefer quality over quantity".
Why is it that still even now after all these years the avatar in SecondLife moon walks like a zombie. Creative directors need to appreciate how important immersion is in 3d environments and how fragile it is.