Smallbiztechnology.com: Email Marketing 2.0: The Smart Phase of Customer and Prospecting Outreach
“Most businesses with any half decent type of marketing have an email newsletter and website. Everyone of them might not have a blog or be active in Twitter, but they definitely would have a web site and email newsletter.
Traditionally, email marketing has been a very simplistic approach. Create your email newsletter (have great subject lines, content and overall design) and send it out on a regular basis to an bunch of email addresses. You might get more sophisticated and have a variety of email lists, but overall, you probably send the same email to the same lists.”