Well, while I was wandering around the Ascalon Hills, I came across a Statue of Grenth. I walked up to it and kneelt and an avatar of Grenth called Voice of Grenth rose up out of the ground. When I talked to him, I got 2 choices.
If I forked over 50gp he cast Dwayna's Blessing on me, which reads:
Enchantment Spell. Target ally regains health faster while this spell remains in effect. And now I have 3 pips on my health bar!

If I forked over 100gp he gave me +4% morale!
I don't know how long the Blessing last but I assume it will last until I return to town! 3 pips is pretty good for a mere 50gp. Now if only these statues were outside all the towns. I wonder if the different god statues do different things?
I've attached a picture for the non-believers.