To be more on a little more on-message, I think Obama needs to come out and say:
"The reason Washington always fails to protect our kids and protect our families is because sleazy politicians like John McCain, Sarah Palin and George Bush like to play political games with issues as important as the threat of child predators."
Disregarding ideologically, I'd say an equivalent would be John Kerry tapping Barack Obama following Obama's 04 convention speech.
He wasn't (and isn't) as big a leftie as Palin is to the right, but there would have been considerable excitement among progressives, I think, accompanied by the same questions regarding his experience and readiness, etc. etc.
I don't think the polls coming out these days, especially this weekend (between conventions, over a holiday) actually do matter at this point. Too much noise and uncontrollable variables, not too mention unprecedented situations (back-to-back conventions, etc.).
We should probably give it a couple weeks before diving into the polls too heavily.
I wouldn't be surprised if there were more people on Barack Obama's campaign payroll than there are in Palin's State House, and they've been running the two for approximately the same amount of time...