So, how many folks here have a copy of Green Ronin's Book of the Righteous?
It's quite simply my favorite Third Party product of the 3rd Era of D&D; a comprehensive, fully realized pantheon and cosmology ready-to-use for any campaign.
It could also easily be updated to 4th edition, since all the Churches had both Clerical orders as well as Holy Warrior orders, which could easily translate to Clerics and Paladins.