A radio show host in Washington DC has started a site called "Your Fan Mail". It will send you e-mails telling you how great you are, and how much they adore you. This way you can be a celebrity too.

I haven't signed up for this, so I can't tell you much about it.

However, doesn't this have some great potential as a marketing engine?

People visit this site, and submit their name and e-mail, and receive e-mail on a regular basis. Imagine writing the e-mail text in ways that incorporate product promotions, or reference other websites.

Now, if they only expand on the sign-up process to include more pieces of information, such as sex, age, and hobbies, then they could turn it into a powerful marketing machine.