My friend and colleague Nick Usborne has the gift for a "turn of phrase." He used the words white color spam in his blog a few days ago. Next thing he knows, Seth Godin mentioned it in his blog. Then came a call from The New York Times. And this article, Big Companies Add to Spam by Saul Hansell which quotes Nick. You know what he's talking about. When you register on the Palm site, for example, using an email address you don't use for anything else. Subsequently you begin receiving emails you haven't asked for from…