I can't say enough to recommend Everett McKay's UX Design Essentials course for anyone that wants to learn more about what makes a user interface "delightful." The course is an informative blend of practical, boots-on-the-ground advice you can apply to your website right now interwoven with engaging stories and anecdotes about the successes and failures Everett has encountered throughout his career. There are also some great philosophical insights about the art of design and what makes one product succeed where another product fails.
The course material is well organized and structured in a sensible progression that leads you through team exercises so you can practice the techniques you're learning. Even a design veteran will discover new, useful tools to add to their design toolbox.
I have always wanted a book that was focused as sharply and as astutely on this topic, and now I have Everett's incredible course (and his PowerPoint deck!) to guide me. It was the best three days of training I've ever experienced, hands down.
On November 14, 2012, I presented "Great UX without time, money, or design skills" to the Stanford Igniters in Mountain View, CA. Here is a summary of the presentation, plus a link to the deck and various related resources.