Marc Ambinder isn't the best tweeting journalist to go after, says Jeffrey Goldberg. "He's actually literate, and he actually reports -- and values reported, closely-edited journalism. If our business were filled with Ambinders, it would have a brighter future than it currently has. And it definitely needs more Packers. [Nick] Biltons it already has in abundance." || Twitterverse reaction to George Packer's latest post.