http://blogs.msdn.com/b/vcblog/archive/2012/09/20/10348466.aspx?wa=wsignin1.0
The one thing that stuck out for me was the page turn gesture. It would be great if doing a swipe from the bezel on Quill would turn the page to the next or previous page. Give it more of a NUI instead of GUI feeling. Similarly to how two finger scroll has to have two points far enough away, the gesture would only be recognized if it started at the bezel and traveled the proper velocity.
This covers how to implement a bezel gesture though they are doing it for a different reason but the basic idea is there. I think since Quill is mostly used for tablets, it should be less prone to errors since tablet bezels are huge. For instance, getting Chrome bezel gesture to work on my phone is very hit or miss. But my bezel is incredibly small thanks to the edges of my case.
While researching Android bezel gestures, someone mentioned about JellyBean using the bottom bezel swipe for Google Now so that's probably something to avoid in future Quill development. I haven't used JellyBean yet. Waiting for it to officially hit the Note 10.1 this Fall.