Relic agrees: The cullins/collins thing could have been a tribute, maybe? From what I've heard Twilight tries to be more like Dark Shadows than Buffy (sans flippy fight scene action)
I actually watched Dark Shadows during it's original run back in the 60's. (I was like 3 years old and every time my mom would leave me alone I'd switch to channel to it, it always gave me nightmares but I loved it anyway) Then last year I had the chance to download about 80 hours of it from Stage 6.
I have a real hard time believing that Twilight is in any way, shape or form influenced by Dark Shadows. Buffy, fight scenes aside has a distinct Dark Shadows tone. Actually, there were two Dark Shadows series and two movies. The photography in Buffy and especially later in Angel was very reminicent of the second Dark Shadows series.
I also don't believe that it is possible to RIP OFF and HONOR at the same time.
As I said in my first post, Joss updated some ideas from Dark Shadows but he did it in his own way. Did Twilight's writer just accidently hit on the same inspiration and think to herself, "I wonder if another Vampire in Love style story like Dark Shadows would work?" NO! There was no risk or vision. She knew it was going to work because AT THE MOMENT SHE WROTE THE STORY IT WAS WORKING ON BUFFY. As a Buffy fan, (or for example if I was one of the writers) I would be not only furious but I would be looking for a good lawyers - I'd be surprised if they didn't consult one at some point. This is worst than "I want a new drug" vs. "Ghostbusters."
The fact that the first Buffy movie BOMBED and even within the Buffy fanbase is barely mentioned due to the REEK factor to me only shows that some very brilliant people saw a potential and worked it into something special.
Final Metaphor - Buffy = Baking a chocolate cake from Scratch throwing in all kinds of neat ingredients from all over the place. Swiss Chocolate, fudge from the local church bakesale etc. etc.
Twilight = Frozen Sarah Lee chocolate cake from the local grocery store. Looks like the same thing, tastes somewhat similar but it's still just COLD.
Uncle Rory
PS. I am now OFFICIALLY running for the President of the WE HATE TWILIGHT club.
http://img.photobucket.com/albums/v375/blackmetalkilla/TwilightSucks.jpg