On Freya...it's imminent. First articles were qualified last week. We're just waiting for boards. Should be this week (we'll see.)
With respect to tubes, yes, you'll want matched tubes at least for the input pair. The input pair does voltage gain, so it's the most critical. The input pair is on the right-hand side of the quad. The output pair is on the left-hand side. It's a follower, so it's less critical.
We're also doing some degeneration of the input, so matching will be less critical, but you're still going to want to have reasonable matching.
No biasing is necessary, since the input is run off a current source, which sets the operating point of the whole system.