At the mundane little sysadmin blog I contribute to, I wrote a little piece explaining why you need to know vi keybindings. I’m sure you emacsheads will love it.
When I started using Emacs, I had grandiose notions of producing copious amounts of prose, linking it together in all sorts of interesting and helpful ways, and basically revolutionizing the way I experienced computers. But most of all, I had a new and urgent desire to do everything from the keyboard in a blazingly efficient manner. I proceeded to burn the Emacs keybindings into my brain and fingers. I developed some slightly inefficient workflows (copying and pasting from text documents into OpenOffice documents, editing the original text file based on whatever page length I was going for, rinse and repeat until paper is produced) that were, on the whole, a net gain due to the speed of typing without mousing.