We're still in the process of rolling things out, although I'm not sure I can give a percentage... I think it's safe to say that in the next 6-12 months most (if not all) of them should have an active cluster.

And no, there is not a full POS server on them at this time... it will take us a few years to decompose that monolith, but this is a natural place to put it as we do so.