Mac OS X comes with emacs 21, but it only runs in the terminal. If, like me, you're a Linux user who now also uses OS X, you're probably missing some features in that version, like font-lock-mode and multiple frames. Emacs is not scheduled to officially support an Aqua GUI on OS X until version 21.4, but the CVS version of emacs does support a Carbon GUI, thanks to Andrew Choi's efforts. Building emacs is not that big of a pain, but it can take a while, so I'm sharing a couple of binaries that I built. These will coexist with the emacs that comes with OS X, and I haven't had any problems with fink.
I previously had some builds of emacs that worked on Jaguar up here, but deleted them a while ago. The binaries currently on this page will not work on Jaguar. (Thanks to Kelly Sorensen for pointing this out.) If you want to build on Jaguar, I recommend checking emacs out from cvs and running the "mac/make-package" script in the source tree, which does everything for you.
Emacs in Panther now supports font-lock-mode in the terminal, but if you want multiple frames (and multiple fonts), then you'll want this binary. All of the necessary goods are in the app bundle. Enjoy!
Any questions, please contact me via e-mail -- willb@cs.wisc.edu