Colombian Orchid Imports - Check out Colombian Orchid Imports, ran by Gary Meyer. He is able to import tons of Colombian orchid species, including many hard to find pleurothallids. Check out his list of dracula species.
The Orchid Source Forum - OSF is one of the best Orchid forums out there. Have a question? Chances are someone there lurking about has the answer.
Pleurothallids.com - Lynn O'Shaughnessy's website serves two purposes; to see photos of Lynn's pleurothallids (including draculas), check out her awarded plans, and view her sales list. It also serves as an informational site for the pleurothallid alliance.