Joe Biden is Obama’s VP. From a graphic design standpoint, it will be much easier to get the words “Obama-Biden” on a bumper sticker than “Gore-Lieberman.” Obama wisely decided on a VP candidate with two syllables. And I suspect that the natural third B (“Oh-ba-ma-bi”) that comes with that phrase was also a marketing consideration. Of course, should Biden decide to plagiarize again, at least he’d be copying from Obama’s team.