TextWrangler 2.0 Freely Available
Newly released TextWrangler 2.0 is now free (as in beer). TextWrangler is a stripped-down version of the popular BBEdit text editor. TextWrangler has switched identities since 1.0, from being a text editor with an indeterminant purpose to a subset of BBEdit, a BBEdit Lite on steroids. It handles syntax coloring, scripting tools (perl, python, shell), and some Xcode integration. It does not include some of BBEdit's more advanced features like source control, CodeWarrior integration, glossaries, and creating text factories (though it can run existing saved factories). BBEdit remains $200, and TextWrangler still qualifies for BBEdit's $130 cross-upgrade price. Previous purchasers of TextWrangler qualify for a store credit (they will be notified via e-mail).
You answered your own question there, at least as far as most Mac users are concerned. The emacs user interface is completely foreign to a Mac environment.
I see it the other way. BBEdit beats all of those text editors hands-down, but was beaten on the price. Now, TW gives you most of BBEdit for free, and is the best low-priced editor out there, with BBEdit as the best high-priced one (although its price is not that high if you use it for work 20 hours a week, as many of us do).