They have a website at http://mysticon-va.com/ with a list of all the other guests -- but, alas, it says there that they are sold out, so if you're not signed up, you may be out of luck.
I am looking forward to spending some time with old friends there, and to making some new ones.
Truth be told, I need a good con just about now. I am tired and I am stressed, and I am so so so sick of the toxic rancor that more and more seems to characterize the internet.
So... let's raise a few glasses and have a few laughs at MystiCon, and try to remember why we love science fiction, fandom, and each other.