Families does this with increasing frequency as the Cerebus Syndrome kicks in and it reaches the climax. It got to the point that the fans started complaining, and when the author finally resolved the main plot, he made a point of not having one of these and then pointing it out.
Crisis Equestria might as well be renamed Cliffhangers: The Story, seeing how many chapters end on one. From big cliffhangers (Chapters 17 and 29 being the biggest two) to small ones (every other chapter, practically, including Chapter 1 itself), this story will not disappoint fans of the cliffhanger.
About half of the chapters in Halkegenia Online end like this. Since the author updates so quickly, there's usually a new Cliff Hanger every week.