I've incorporated this setup into my deck and it seems to work pretty well. Inner Rage is 0 mana and the Berserker is 5, you can instantly build it to a 7/6 for very little cost. I've found that it forces classes such as Rogues, Priests and other Warriors to use their insta gibs (Assassinate, SW: Death and Execute). This can serve as a distraction for other builds with a Weapon focus or Minion Buffing using Charge etc.
The Beserker also stacks moderately well if the field is full and WW is used to both clear/weaken and buff him.
Warriors have a lot of cool card interactions like this. Check out my warrior super synergy deck for more examples of them all working together in the same deck:
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