Got these from www.wowwiki.com... seem to be pretty good, but feel free to test them out:

Druid: (Strength * 2) - 20
+ (Character Level * 3) (in Bear Form)
+ (Character Level * 2) + Agility (in Cat Form)

Hunter: (Character Level * 2) + (Strength + Agility) - 20

Mage: Strength - 10

Paladin: (Character Level * 3) + (Strength * 2) - 20

Priest: Strength - 10

Rogue: (Character Level * 2) + (Strength + Agility) - 20

Shaman: (Character Level * 2) + (Strength * 2) - 20

Warlock: Strength - 10

Warrior: (Character Level * 3) + (Strength * 2) - 20