I have to say, I don't care about this ancient shit. McCain has already made amends for this 80s shit years ago. The only reason this is being brought up is because the Republicans have slipped back into their "attack and destroy" campaign methods that worked so well for them for decades. It's not going to benefit Obama to become one of them.
It's relevant because it involves economic corruption -- which plagues us to this day, still. McCain doesn't seem to understand the "fundamentals of our economy" either. It's not quite as ancient as the Ayers story (back before Obama was even a teenager).