Shiny forager blog has a post entitled have you worked for free?
In the post she says:-
I am presenting a paper at the conference. It is called: Would You Work For Free? Unpaid Work in the Information Profession and How to Make it Count.
In the article she also says:-
Dear reader, can you help? - either by participating in my survey or passing it on to anyone in your network to whom it applies? You can find the survey here: http://www.surveymonkey.com/s/VCV6RHN
So, if you have time, please do the questionaire, it only take a couple minutes.