Interesting - according to CNN, there is no evidence to support a long term friendly relationship between Bill Ayers and Barack Obama, whereas there is evidence that John McCain attempted to protect Charles Keating (although he was cleared of ethical wrong-doing) during his committing of fraud in the 1980's senate scandal.
CNN Political Ticker: All politics, all the time Blog Archive - Fact Check: Is Obama ‘palling around with terrorists’? « - Blogs from CNN.com
CNN Political Ticker: All politics, all the time Blog Archive - Fact Check: Did McCain intervene on behalf of Charles Keating? « - Blogs from CNN.com
Bringing up Jeremiah Wright again is clearly an asinine act of desperation; there was 5 straight months of it in the mainstream "liberal" media and he still won the primary, it's clear no one cares. And personally, I would rather vote for a politician who associates with people who fight for what they believe in than some thieving corporate whore.