There are quite a few Mac-ifications of Emacs around. This one's the keeper.
I've been using Emacs for around 20 years, XEmacs for around 10, and Macintosh about that long, too. I was using XEmacs + X11 in OS X, and having my Emacs was more than worth the bonus overhead of X11 until the initial Leopard X11 hiccups pushed me to try to do without.
I tried several other MacEmaxen, but stability problems, or old-release Emacs cores, or installation problems, or ugly fonts doomed 'em all. Getting what I wanted out of Aquamacs involved a bit of learning, but in the end my only complaint is their particular resolution of the inherently unresolvable keyboard bindings problem (is it "cmd-c" or "opt-c", and does it mean "copy" or "capitalize" or "cedilla"?). But my fingers are learning....
I see a lot of very nice WordPress blogs. Mine was never so nice, as I found it to be considerably more work than I expected to do such things as swap in a new skin. The WP version upgrade process totally whipped me, though, and I am now no longer a WP user.