Custom Theme Design on building a basic theme options page. It’s short, but the sample code is clearly written and commented enough to help us learn. Worth a read.
Read it. Top to the bottom. Very informational.
Not your usual plugins list. Take a look.
It’s not every day you get to see a theme like this. This is a free theme specifically made to be used with the WordPress e-Commerce plugin. I can’t find what the license is, but if it’s GPL I’d love to see it done for a more general blogging purpose.
Mark Evans on the upcoming 2.7 release. Also worth reading: The discussion thread on Hacker News on the article.