September 10, 2011 update: This checklist is now outdated. The most updated checklist in the Codex is available here.
Last weekend I was looking for an excuse to play around with JQuery, CSS3 and designing in general. After looking around for a bit I decided to make a more interactive version of the Theme Development Codex on WordPress Codex.
My version formats that list for better readability, adds checkboxes and counters so you can track your progress, editable labels, and so on.
You can also download a copy for your own use. Click on the image above (or here: WordPress Theme Development Checklist Tool) to check it out.
Any ideas, comments, bug reports, let me know in the comments area.