Just for the sake of balance, let me say that I agree with Amy Tennery’s conclusion but not her rationale:
We can’t forgive Akin because there are people (lots of them, in fact) who still don’t understand what he said is fundamentally wrong.
Forgiveness should be based on sincere remorse (which Akin hasn’t shown, in my opinion), not on whether the effects of the offense have diminished to our liking.