The presentation:

The handout:

The stuff we made:
http://twittermathcamp.pbworks.com/w/page/82587826/Hinge%20Questions

The sources I used:
Dylan Wiliam paper on Analyzing Diagnostic Items:
http://www.dylanwiliam.org/Dylan_Wiliams_website/Papers_files/DIMS%20%28NCME%202007%29.pdf

Some blog posts about the topic
http://srenshaw.wordpress.com/2014/01/10/what-are-hinge-questions/
http://assessmentcommunity.com.au/index.php/articles/post/when-might-hinge-questions-become-unhinged
http://www.outstanding-lessons-made-simple.co.uk/hinge-point-questions/
http://improvingteaching.co.uk/2013/08/17/28-hinge-questions/
http://improvingteaching.co.uk/2013/08/17/do-they-understand-this-well-enough-to-move-on-introducing-hinge-questions/

I also used the book Embedded Formative Assessment:
http://www.amazon.co.uk/Embedded-Formative-Assessment-Dylan-Wiliam/dp/193400930X/ref=sr_1_1?ie=UTF8&qid=1406253916&sr=8-1&keywords=embedded+formative+assessment