See the story here. Although I like Webb, I'm not surprised that he pulled himself out of the running. He's an independent guy ("maverick" would be the right term) and not someone who is likely to relish the discipline and spotlight of a national campaign. It's also a bit hard to imagine him enjoying being vice president.
Free Trade vs Protectionism: Weapon of Mass Distraction - A historical take on the push and pull over "free trade".