Xah Lee announced on his Emacs Blog that he has started an Emacs stream on G+. If you’re interested in Emacs, you should check it out. You don’t have to be a G+ member to read the posts.
Also interesting in that post is a link to A Curious Look at GNU Emacs’s 1000+ Default Keybindings. In it, Lee looks at the default keybindings and finds many strange things. Some of the bindings are historical artifacts and not used anymore. Some are accessed with keys that don’t appear on any modern keyboards. It’s an entertaining post with lots of things I didn’t know before. There’s even a picture of the Symbolics Space Cadet keyboard that had some of those mysterious keys that are no longer extant.
Update: binding → bindings