My legal dictionary (Texas Law Review) says:

"A work is "published" when it is first made available to the public on an unrestricted basis. It is thus possible to display a work, or distribute it with restrictions on disclosure of its contents, without actually "publishing" it. Both published and unpublished works are entitled to copyright protection, but some of the rules differ."

So, unless I'm confused (quite possible), if you've made it public (don't matter how) you've been published.