Be sure to read it all if you do article marketing for link building. You're likely doing it all wrong and Karon tells you why. Good stuff!
<a href="http://www.marketingwords.com/blog/?p=1409">The Panda Spillover: Losing Links through Article Marketing</a>
via the Marketing Words Copywriting Blog
Article marketing is a hugely popular method for link building. So much so, that it has lead to the decline of article marketing as we know it simply because writers abandoned their sensibilities when it came to developing article content that would please people as well as the search engines.
The creation of substandard articles produced in mass to flood cyberspace with junk that has no other purpose but to supposedly generate links is an oxymoron.