The BL/JISC 2009-10 annual report on Researchers of Tomorrow: A Three Year BL/JISC study tracking the research behaviours of Gen Y doctoral students was just released in June 2010.  While the report doesn’t mention ebooks per se, it does highlight how library collections and services are used/not used by PhD student in the UK.  Students expressed particular frustration with getting the full text of scholarly journal articles, particularly those they found citations for in google scholar/library citation databases where full-text was not subscribed to by their institutions. Other topics of discussion include: using IT in research, main place of research work, training and support of research, use of ILL services, consultations with subject specialist librarians.  One statistic I found interesting was that 57% of Gen Y students have never used advice from subject specialist librarians.