This is interesting. I just did a quick search on 'foxfire' and cross-referenced any species mentioned in the article with Roger Phillips' Mushrooms book. The interesting part is that Roger describes the fruiting parts, but doesn't mention a luminous mycelium.
As it happens, I brought home a piece of pinewood carrying this fungus
My plan is to carefully locate it under some nearby pine trees and monitor it in case it does eventually fruit. Then we can have a proper chance at ID-ing it. At present it's in my bedroom, glowing dimly... not much use there.
oj