A number of times per day equal to his Charisma modifier, the cleric may instantly transport himself as per a Teleport spell. The distance he may travel is equal to a roll of (2d6 + Charisma modifier + cleric level) x 10 feet. This is a supernatural ability. It requires a move-equivalent action.
Thoughts?
so.. a 5th level cleric with a +2 chr bonus will be able to teleport on average 130 feet? Doesn't seem useful until later levels.
I would go with something like giving a movement bonus to everyone in the party, or like i've said before, reducing the random encounter dice rolled.