Sarah Palin lived really close to Russia.
Sarah Palin stopped in Ireland for half an hour last year.
Sarah Palin has executive experience in the PTA.
Even with that gone I think Obama should just stick to the message he outlined in the convention because this plays into his hand so well. John McCain doesn't have the judgment or temerity to be president. He agrees with George W. Bush 90% of the time. On Iraq he was wrong. On timetables he was wrong. On energy he was wrong. On healthcare he was wrong. On veterans issues he was wrong. Contrast with correct choices made by Obama on those issues. Then bring up the first presidential decisions each of them made. Obama picked Joe Biden as VP who has more foreign policy experience than anybody in Washington and who nobody would doubt for a second could be president at a moments notice (even though Obama is perfectly healthy) whereas McCain picks the most inexperienced person possible while his health and age isn't that great. Really?
The republicans still aren't done with the convention stuff. They could still say "Psyche! It's Romney!"