Yeah, my Dwarven Cleric got in trouble because I didn't know that turning (and when we switched to pathfinder, channel energy) keyed off of charisma. Serves me right for not reading the entire entry. At least my charisma was only 10. It could have been lower. Fortunately, it only adds to the number of times per day you can use channel energy, it does not change the efficacy of it.

As to prestige classes: with the domain abilities, I haven't really been tempted very much. At least, with fire domain, fire resist 20 has been very useful.

Holy Vindicator looks interesting, but I'm not sure I'd be willing to give up the domain advancement or any levels of divine spell progression. I suppose if I was going for concept, sure, but Cleric has plenty of ways to improve to-hit, it doesn't really need full BAB progression.