Do you remember that half a billion dollar Microsoft ad campaign we told you about a couple of months ago, architected to improve the image of Microsoft and Windows Vista? Well, the first two ads in the campaign have hit, and if nothing else, they’ve got people talking.The first ad featured Jerry Seinfeld stumbling upon Bill Gates shopping in a Shoe Circus store for discount shoes. There’s some wacky banter between the two, a few funny moments, and an Easter egg or two (am I the only one that noticed Bill’s