Copyblogger is all about “how to sell with blogs, e-mail and RSS.” It looks like an excellent resource for small businessses and consultancies looking to leverage the power of the Web to market themselves.
Copywriting 101 is a set of articles about persuasive writing for the Web:
Copywriting skills are an essential element to the new conversational style of marketing. Whether you’re looking to sell something or to build traffic by earning links from others, you’ll need to tell compelling stories that grab attention and connect with people. This tutorial is designed to get you up and running with the basics of copywriting in ten easy lessons.