Hi,
This is just a quick update that as of late October, WMF is officially hosting a Tor relay: https://atlas.torproject.org/#details/DB19E709C9EDB903F75F2E6CA95C84D637B62A...
This is not an exit node, and it's just a small contribution to the network. Really - anyone can do it: https://www.eff.org/torchallenge/
We want to note that editing via Tor is a whole other matter, and I would refer to previous conversations on this list if you have questions about the current state of things. We also currently have no plans to run an exit node or a hidden service, but we're open to suggestions for additional ways in which WMF can support anonymity and privacy.
Sincerely, Faidon