Why a Wiki? Edit
There are other websites that list US comic cons, but all of them are curated by someone. The wiki is open to everyone, putting four friends who decide to hold a zine fair in their college cafeteria on the same list as giants like the San Diego Comic Con and SPX.
Who Can Be Included? Edit
Any event where comics are a significant part of the entertainment or merchandise, I'll leave it up to you to determine what "significant" means in this context. I have not conventions that are strictly devoted to fantasy novels, Science Fiction, or Anime, just for the sake of space.