7 Principles of Rich Web Applications is a worthwhile read for any developer with any level of involvement in front end UI/UX.
Backup your stuff! The whole thread is interesting reading (assuming you enjoy reading about hard drives and data recovery).
An interesting video. If you believe it (there’s no reason not to, and you could easily setup your own test for a few bucks if you don’t trust his metrics for whatever reason) then there’s something very wrong with Facebook’s paid advertising.