The Application of Weblike Design to Data: Designing Data for Reuse
This entry should be taglined, "just use HTTP and move on with your life."
Once you are at peace with the idea that HTTP is the protocol you use, your mind can move on to more interesting notions. I.e. it's not the protocol that's important, it's the data. Oh yea, and go through the presentation; plenty of good stuff in there.