I found everyone in my original list except 'Mountain Mist' - I'm also still missing 'Athene' and 'Clifford's Comet'. I dug down and think I found 'Athene' - is it in a spot a few feet from where I planted a hosta that "disappeared" over the 2008-2009 winter. However, if it doesn't come back, I'm not going to plant anything near that spot again.
I actually think all the hostas made it through that hard frost last week, which makes me very happy!