With the release of Emacs 24.3 last month and the big changes at EmacsWiki, I've posted an updated version of the giant Emacs reference card. It now contains new sections on Calendar mode, Ediff and Abbrev mode. There are also new example commands for keyboard macros, Dired Mode, Occur Mode, table.el and Calc.
There are now more than 2000 commands up from 1500. It should also be consistent with the latest version of Emacs.
It is released under a bunch of free licenses, including version 2 or later of the GNU GPL and version 1.2 or later of the GNU FDL, so people are free to share and modify it.