@Nick Ashley,
I'm bemused that anyone on any side figures they can change someone's mind with a phone call or a mailer. But.. I'm wrong, of course, since I guess there must be some underlying data to warrant all the calls, door knocks, and mailers.
On how they got your email, Nick, I dunno.
I've gotten a few Obama emails since I looked at the site to figure out where the early voting location was in my neighborhood, but I presume you didn't sign up on a McCain site.