Check out this new article Wizards of the Coast posted recently:
Excerpts: Gods and Followers
We continue with Chapter 5: Gods and Followers. "Almost all beings in Faerūn worship many gods; as a rule, only zealots and clergy venerate just one deity. In other words, a farmer could mainly revere Chauntea, but also pray to appease Talos to keep crop-damaging storms away, Malar to keep beasts from attacking him or his folk in the fields and to send vermin elsewhere, Talona to keep disease and blight at bay, and so on."