The emacs-fu site has a summary of features
to be found in the upcoming emacs 23 release. "Emacs's character set is a superset of Unicode, with about four times the space available. That should be enough for the foreseeable future
There are also many new character sets available, as well as new language environments, such as Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu, Sinhala, and TaiViet.
" Also pointed out is an implementation of butterfly mode
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