djcb writes "After only 2 years since the previous version, now emacs 23 (.1) is available. It brings many new features, of which the support for anti-aliased fonts on X may be the most visible. Also, there is support for starting emacs in the background, so you can pop up new emacs windows in the blink of an eye. There are many other bigger and smaller improvements, including support for D-Bus, Xembed, and viewing PDFs inside emacs. And not to forget, M-x butterfly. You can get emacs 23 from ftp.gnu.org/gnu/emacs/ or one of its mirrors; alternatively, there are binary packages available, for example from Ubuntu PPA."