If you haven't been following the news: Yes, it's Gary Lehman. For tonight's Tristan, anyway. I don't recall ever hearing him as a baritone, but it's an interesting prospect.
Meanwhile -- I didn't think it would be necessary, but I'll have another post on Lucia later today.
UPDATE (3/15): This time Voigt withdraws? What on earth is going around at the Met?
The question now, I suppose, is: "Janice Baird?"
UPDATE 2: Press reports suggest Voigt had a stomach bug.