That was written in Mail on an iPad using an Apple bluetooth keyboard, then emailed to posterous.com. This is the reason for the horrible line breaks, but I left things that way deliberately. Certain "simplistic" tools force me to concentrate on writing and not on formatting, and that helps me write more often. I'm a big fan of markdown for this reason, and tools like Github, Byword, or Textastic that embrace markdown are my preference.

But I usually write essays using TextMate or Byword on an iMac. I sometimes use Mail on a Mac, but the formatting when it reaches posterous.com is nicer.