"Haven't heard of anyone eating it, though."
No, you don't want to eat it. I've been making tea with it but you have to strain it with a coffee filter or put it in a tea bag to remove the fine hairs (fuzz) on the leaves. One of my daughters brought over some tea bags she bought at a health food store that you can put your own tea in and seal it with a hair curler. Those work great because they're pretty big and Mullein is pretty fluffy after you crunch up the leaves.
It really helped me with breathing easier after I caught that nasty flu and got a lung infection with it, but I have to mostly drink it at night because it does have a bit of a narcotic effect. It's pretty mild, but you can feel it. Helps me sleep good