My post below on Jesse Garret's Ajax primer led me to take a closer look at Garret's company, Adaptive Path. They're a user experience design shop, and they have some great resources on their site, ranging from paid reports on topics like "How Labels Affect Usability and Branding" ($20) and "How ROI Changes User Experience" to free articles on topics like "Making a Better CMS" and "Metadata for the Masses". Very cool.