Bruce Black over at Wordswimmer has posted an interesting piece about chapter endings - using the metaphor of waves to cite the need for the chapters to push and pull the reader through the story.
And he uses a chapter ending of mine as an example! (From How to Steal a Dog.)
If you don't check out Bruce's blog on a regular basis, you should. He offers all kinds of nuggets for writers and has interviews with children's authors galore.