My favorite quote of all this was from an EFF attorney; to paraphrase: if someone steals your iPod, the thief would have the name and email address of the rightful owner!
No kidding! I've seen people complaining about this in blog posts that include their email address. I've heard some people even voluntarily share their email address with other people.
I just have a really hard time imagining a global plot to steal iPods as part of an email harvesting scheme.