A couple of months ago, a spammer was arrested, convicted, and sent to prison for 9 years. Personally, I'm very happy. These spammers need to be dealt with before this problems grow completely out of control (some may say it's too late already). Though spamming may seem harmless, spamming is really another way of sending trojan horses, phishing emails, or even viruses.
On the other hand, the punishment does seem a little severe. I've heard of convicted murderers (of varying degrees) that have gotten less jail time than this spammer. Maybe they are just using him as an example.
I also might add, the jail time will be served in a federal "pound-me-in-the-ass" penitentiary, not a little minimum security establishment.