I often wonder how people discover the not-well-exposed mangas, animes, music, or any form of art thats not woven into the mainstream.
American manga-market is mostly aimed towards Shoujo, since the corporate big-heads think it would be a bad decision to make little boys read, and turn their heads away from the TV. So reading any worthwhile manga will most likely come off the net.
So how did you stumble upon Gantz? What ever led you to read it?
For me, it was when i visited the Band of the Hawks' scanlations site, after a recommendation to read BERSERK. Since they used to scanlate Gantz i also began reading it, and through a DL link it led me to the StopTazmo forums, of which i ve been a member since.