hi, im quite eager to know about HDR and made one.
i have not taken different exposures but rather made 3 images PP to create EV variantions.

http://lh3.google.com/aud.aaz/R8iEqu7Iu7I/AAAAAAAABNc/JGtX9AdQlmo/s512/sepoc%20tree%20final%20hdr-1.jpg