Man, I miss this Madame X. It's cool that she can generate enough interest for her own Vertigo series and all, but that chick just isn't this one. It's a shame she never really caught on in her modern incarnation.
Though I wonder how much of that is due to bad marketing. I see a comic named "Doorway to Nightmare," I'm going to assume it's a horror comic; if I then read a bunch of stories that really, are essentially superhero stories (Madame X definitely was - happy endings were the rule and there was less permanent damage to bystanders along the way than a Golden Age Supes comic), I'm going to stop buying it because it wasn't what I was looking for. If I'm looking for superhero comics, though, I'm not going to buy it in the first place because I'm going to assume it's horror. She might have had better odds in a different book.