Does anyone know of an instance hosted locally? If not, I'm happy to set one up. May need helping administrating it, though.

I've noticed that other server instances can be quite slow, so I thought a local instance would be a nice latency reduction, depending on how exactly ActivityPub works. I haven't read up on the protocol yet. If it doesn't respond to the client until the remote federated instance responds, then there'll likely be no gain in speed