American Gods: The forgotten god

Who do you think is the forgotten god (whom we meet in Vegas, and no one can remember, 5 minutes after meeting him)? You can see some interesting theories here: http://www.frowl.org/gods/forgotten.html

I'm just glad I'm not the only one who couldn't figure it out!

After reading those theories, Hades makes the most sense to me. I don't think Gaiman would have gone as obscure as some of them, although the Celtic one is certainly possible.