This is the result of web surfing at 2am.  I have now idea how I stumbled across it.

http://www.fvza.org/

Someone should write a fic about this!

According to this (though I didn't read all of it- just skimmed it), vamps shouldn't exist- or at least in large numbers on BtVS.  It's really a bunch of crap with numbers, created by someone far geekier than myself...  Still kinda good for a laugh to see the responses.

http://www.collisiondetection.net/mt/archives/2007/03/mathematics_pro.html

lol. I took a deep, metaphorical breath to launch into a rebuttal about how vampires can exist in the Buffyverse...then thought "what the hell am I doing?"

I stumbled on this site last year.  Notice it says for entertainment purposes and didn't get sucked into any discussion.  However there are some truly interesting sites about and supposedly BY "real" vampires.  They have some really interesting forums (and most like the Buffy and Angel shows too BTW although they scoff at the inaccuracy of the portrayals).  They discuss blood vampires as well as emotional and psychic ones and it's an interesting part of our society we aren't usually made aware of.

Kathleen

google is my friend