It seems that some fans have decided that their worship of the sparkly vampires of the Twilight novels should be literal, not just literary. Yes, someone seems to have founded a Twilight based religion.
From the SF Examiner:
'Twilight' series spawns religion: Edward Cullen is real, members should read the books like a Bible.
Someone please demonstrate that this is a hoax.
EDIT: Apparently, the Examiner didn't check sources very well. The SFE article was based on a report at Pillow Biters, a Twilight fan forum. A quick Google search of "Cullenism" yields
this link, where the Cullenites describe themselves as not a religion, but a study group which explores the values presented in the novels compared with religion. That they call their meetings "TwiChurch" probably doesn't help clarify matters.