“Friend —- I have some important news that I want to make official. I’ve chosen Joe Biden to be my running mate.”
Some blogger says his wife is fantastic.
New York Times portrait of Joe Biden.
UPDATE: Barack Obama’-s speech + Joe Biden’-s speech
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I think it is the worst pick ever. What a blunder. Joe Biden (a D.C. insider) is unpopular and gaffe prone. Plus, that choice shows that Barack Obama is insecure when it comes to foreign policy. An emphasis on the economy and, thus, on a successful gubernatorial experience would have been better.
Kathleen Sebelius was the one to pick. She is my vice president. (And Ron Paul is my president. 
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I have over-estimated the secretiveness of Barack Obama’-s decision process. The chart above obviously shows that the Joe Biden narrative leaked out to reporters was beamed out for a purpose: testing the Obama-needs-a-VP-who-is-strong-in-foreign-policy argument, and letting the Press do the final vetting on gaffe-prone Joe Biden.
InTrade CEO John Delaney (along with the HubDub and BetFair people) will now brag on his marketing material that his prediction exchange did forecast Joe Biden as the Democratic vice president nominee.
What’-s bad in all that (other than I have an egg on my face [*] ) is that we won’-t have a public debate on the different quality of the various primary indicators, and how that conditions the accuracy of the prediction markets.
[*] I have an egg on my face, but Caveat Bettor has a whole omelet on his.