Web Application Form Design
Web Form Design in the Wild, Part I
Web Form Design in the Wild, Part 2
Luke taught an interface design class I took back in grad school, which is why I was initially aware of his work. I was happy to learn, given the context of the ongoing discussion in this group, that he has spent an inordinate amount of time writing and thinking about form design. He's now Senior Principal of Product Ideation & Design at Yahoo! and has a book on form design in progress.
I found the short article on Web Application Form Design above to be fairly useful, so I figured I'd just register these resources for the ongoing discussion.