Via Kevin Aylward at Wizbang!, the Swift Boat Veterans for Truth have published a letter to Senator Kerry, asking that he take four steps to clarify circumstances surrounding his service in Vietnam and after he returned to the United States. If he does, they say they "will be satisfied that the American public has been sufficiently apprised as to these aspects of [Senator Kerry's] career," and they'll stop their ad campaign.
I'm not sure how this will play out, because Kerry will never agree to the terms they laid out. But at least they'll be seen by many folks to have made an offer. I have the feeling that the net effect will be further damage to the Democratic nominee.
That prediction is worth every penny you paid for it.