A Twilight dating site? Um.. what exactly would that include? Regular people dating one of the characters in the Saga? A regular person dating people with the same names as the characters in the Saga?
How would they work? It wouldn't. I'm sorry, but there's enough sites dedicated off of Twilight. There's MLIT (My Life is Twilight) based off of FML (F My Life). That's probably as ridiculous as it gets. I mean, I'm a huge fan like the successivo person, however, I know when it's too much. And it is definitely past the line of too much. I have occurences in my days when I am reminded of Twilight, however, I don't make up a website that consists of occurences that happen to people all over the world. Setting up these types of websites/fansites are just people asking to be made fun of. Twilight fan wonder why they are teased all the time, well here's your answer.
I have no problem with having fun with Twilight. However, it's a little too much and alot of the fans/fangirls don't realize that.
I don't think there is, I think it would be a little weird 'cause your dating someone te don't know just 'cause there a character from a book. It would be just like a dating site and there is already many of those.