The Obamas rock the fist bump after cinching the nomination. Some conservatives went crazy, but I think most of us found it cute. Also, I agree that while Obama has had to take pains to prove he isn't "too Black" for the ever-skittish White voters, he's also demonstrated that -- even in timid form -- he is able to push boundaries and increase what is socially acceptable for Blacks in America, and that's important.
Also, Wes Clark apparently beat him to the dap (I've never heard the term "dap", but apparently it's in use. I'm so old!). Another sign that he's right VP choice? It was in an ad featuring Clark's views on Outkast, after all.