Google Penguin Penalty SEO Tips, how can you survive post Penguin update?
Matt Cutts from Google explains how Wordpress does 90% of the SEO work for you out of the box.
This page demonstrates how to remove or change the footer links for the ClassiPress theme. Specifically, how to update the “Classified Ads Software | Powered by WordPress” links in the footer of the Classipress theme. Additionally there a a video that shows you what how to do it visually.