The McCain camp will do all it can to ensure that peripheral "items" come up; they should be dealt w/swiftly and accurately as they arise. The R's have nothing to run on, so it will be attack 24/7, if Obama wants to show people that change is coming, he'll deflect the stupid stuff, stick to the issues and rip McCain apart, as well as many R's in Congress by association.
Alexander Hamilton was accused of being a womanizer and a bastard, serious charges at the time, he came right out and stated he was indeed a bastard, and he loved many women. Almost immediately, the "scandal" fell from the lips of the opposition, and he was to become the first Treasurer of the US. Point is, honesty and being forthright enamored him to those who would make him Treasurer, and the masses loved the openness.
Same thing applies here...the old saw, "one cannot choose their parents, but they can choose the path they take", should deal w/a lot of the trash that will come down the pike. After answering "charges", there should be no elaboration, just stick to the facts and keep plowing ahead on real issues. McCain can't handle anything concerning issues for a number of reasons, first being he's tied to bush at every facet of this travesty in the WH. Second...he has no plan, no ideas, nothing but the same old crap for another 4 years.
He's going to fall flat on his face the first time there is a face to face exchange, from there on in, it will be ours to lose. The attacks will be more numerous and hotter, but people will see, as time goes by, that it is pure desperation on the part of the R's and it will be all over in a matter of days after the first encounter.
We have to hammer home the ideas and future plans, so there is no "sit back and wait for the inevitiable"...this is going to take work, and it is quite possible we can stake the neo-con movement into it's coffin once and for all.