I think you can sum it up as: politics as usual, nothing to see here (in other words, dismissive).

“She is deft at going on the attack. For someone who makes the point that she is not from Washington, she looks like she would fit in very well there,” Axelrod told reporters on the campaign plane in Pittsburgh, Pa. “These attacks all felt very familiar to Americans who are used to this kind of thing from Washington.”
[…]
“Sen. Obama has taken the whole thing in stride,” Axelrod said when asked about the dig on Obama’s stint as a community organizer. “I don’t think he expected gingerly treatment for the reasons that I said. He understands they don’t’ really have a record to run on and this is what politicians do when they don’t have a record to run on.”

Projection anyone? It’s funny that the things that they say about Palin can be said of Obama. Doesn’t he engage in attack politics? Of course he does, we all heard it:

Now, I don’t believe that Senator McCain doesn’t care what’s going on in the lives of Americans; I just think he doesn’t know.
(LAUGHTER)
Why else would he define middle-class as someone making under $5 million a year? How else could he propose hundreds of billions in tax breaks for big corporations and oil companies, but not one penny of tax relief to more than 100 million Americans?
OBAMA: How else could he offer a health care plan that would actually tax people’s benefits, or an education plan that would do nothing to help families pay for college, or a plan that would privatize Social Security and gamble your retirement?

BTW, Obama lied about that, McCain was joking and said they’ll probably use it against him and he was right!
I’m not buying that the speech didn’t bother him, especially the “community organizer” comment. Why else would he immediately send out a contribution letter defending his record as a community organizer?