"Then I found a promising site"
Vampire
Creative Commons AttributionVampire - Credit: sa-cool

Unfortunately, the site Vampires A-Z does not exist, but here is a list of websites featuring vampires:

Vampire

Vampires

Vampire Junction

European Vampire Research

The Vampire Library

Dracula's Homepage

Top 3 Twilight fan-sites

1. The Twilight Lexicon

2. Twilighters Anonymous

3. Twilight Moms