[mikeroher]

I use Vim and was unaware that this shortcut existed. Are there any other Emacs shortcuts which are useful in OSX?

[coliveira]

If you do "set -o vi" you can also use vi shortcuts, such as ESC-j,k to go up/down the history, 0 to go to the beginning of the line, etc.

[pyre]

You cannot use 'set -o vi' to turn Cocoa text fields into vi-mode.

[65a]

Ctrl-K kill to end of line,

so Ctrl-A Ctrl-K will clear a given field

[Fishkins]

And you can Ctrl-Y to paste the line you killed. This is a separate copy/paste buffer from the normal Cmd-C one, which can be nice.