Right now I am functional enough in emacs to do basic things, like write this blog post, but I use too many OS X-isms, like splat-z for undo, and I need to turn those off and learn emacs properly :-)
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It's about time!
If you go the Aquamacs route, you can keep the splat-[ZXCVA] that you're used to in addition to the equivalent Emacs commands. The bigger problem is that once you've adjusted, you'll have a hard time finding an Emacs emulation mode in other editors (IDEA, Eclipse, etc.) that supports the new commands that you've trained yourself on.
Congrats
It's a good road to head down. :-) You'll notice all of the osx windows support the basics like Ctl-A|E|K|Y. Learning GNU-Emacs is a must read (O'Reilly). Good luck.
Cool!
acme-sac is also very cool, IMHO worth learning. It's built from the ground up on top of the inferno OS, unlike emacs, an editor approaching an OS.
The Emacs wiki is pretty good: http://www.emacswiki.org
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