It looks like they're working on pump.io, and it already does some interesting things. I still have my old identi.ca account which now runs on pump.io, although you can't get new accounts there. However, it's got very little documentation, and seem to still be a large case of UTSL.

There's some stuff in its wiki, but not much more.

https://github.com/e14n/pump.io/wiki/User-Guide