Drifted over via a friend of a friend. This is the first Good Omens fic I've ever read, but I sure hope there are more out there like this one; this is just perfect! You have Them all down pat, even Dog! I'd swear I was reading a short story in a Pratchett collection.
(You should enquire if he's making an anthology, like Mercedes Lackey does with her Valdemar books, and accepting submissions! It can't hurt to ask...)