Right now we are using Makehuman avatars with the really simple skeleton. In the coming weeks, I want to create a loader for MHX2 files, for Three.js that will load directly into the world.
We are a group of creators from OpenSim, and want to create a new platform. I'm hoping that we will be able to contribute a lot of avatars and clothes back to this community. The Makehuman bodies have been wonderful to work with. We will probably need help figuring out how to contribute assets back here, to share.
We have a really rough test world that you can visit at https://futureluv.com/world/ if anyone is interested.
You can basically walk around, dance, chat. In the coming weeks we will have more robust avatars and building tools online.