If you’ve been Biden your time, waiting for Obama to announce his VP nominee, your wait is over. Joe Biden (D‑MBNA) will be kicking Dick Cheney out of the Naval Observatory shortly.
I guess I see the logic. He’s a bulldog, has foreign policy experience, and his age makes him unlikely to run for the Presidency in 2016, assuming he’s the incumbent VP at that point. That leaves the field open to other prospects, including Hillary, various likely cabinet officials, etc. His time in DC and in the Senate especially will make him a useful bridge between the Obama White House, Congress, and other entrenched DC interests.
His straight-shooting, trash-talking reputation also puts him in a good spot to be a bulldog to McCain in the campaign. Obama can stay above the fray and let Biden hit back against smears. Biden knows how to deliver a line, such as his quip that Rudy Giuliani’s every sentence includes a noun, a verb, and 9–11.
Not who I would’ve chosen, but I suspect that the VP selection process wasn’t meant to appeal to me.