There is new sheriff in town of holy priest guides for World of Warcraft!
poptisse of Ensidia treats us with comprehensive guide to all things holy, recommended read to anyone running around in their pajamas throwing frisbees.
Ensidia - Holy Priest Guide, part 1
Ensidia - Holy Priest Guide, part 2
One of the best guides I've seen about Holy Priests, and I've read a lot of them over the years.