The Passive Voice had some good ones today: He posted a link entitled "Word Needs To Die" (YEAH!), which prompted everybody to pile on into the comments and explain what kind of word processing software they use and how exactly they convert those files into e-book files. Probably whatever you use is mentioned.
And he put up a link about a robot editor. This prompted more discussion in the comments section about the various different kind of robot editors out there and how well they work.
And he linked to a series on self-publishing by Bridget McKenna, which includes a lengthy article on formatting e-books.