An interesting post from boingboing.net recounts a story wherein a user who had formerly signed up for a Miller Brewing Company contest using a throw- away email address and then threw it away is now getting email from Miller on another account. The return email in the message is from customer- contact.net (blank web server), a domain registered to Equifax in 2002. It's unclear what mining techniques may be in use, but its an interesting turn of events.