As I have said before I am not so concerned about what Ayers did 40 years ago but what he and Obama have worked together on in the near past education policy and social and criminal justice. Ayers has pushed radical left wing indoctrination policies in the schools as a way to achieve the goals he couldn't with bombs, bringing down our capitalist economic system. This ad touches on it but the McCain team needs to expand on that aspect more very soon.
Obama has arguably known Ayers since his time at Colombia in the late '80s and Obama and his wife both worked for the same law firm as Ayers' wife Bernadine Dohrn. Dohrn had continued her activities with the Weather Underground well into the '80s. The question is has Obama been groomed by all these far left radicals from the '60s to be their ace card on the inside straight? It sure fits Obama's rise through politics as a relative outsider to Chicago's machine when he arrived to where he is today.
Update; Jennifer Rubin has a lot more with plenty of links I was to lazy to dredge up.