Over on Friends: Social Networking Sites for Engaged Library Service, Gerry McKiernan, Science and Technology Librarian at Iowa State University, recently posted up an online survey called 'Library presence in social networking'.
One participant had this to add to the survey:
"In our case it is because we are partially government funded and the state government filters our servers. All social networking sites are blocked - so while we will be funded to attend 2.0 training and encouraged to be 'innovative' we aren't allowed to access or use anything of interest (even Firefox is blocked). I think the extreme conservatism of government and university IT services sections is MAJOR limiting factor for many libraries."
Although this hasn't been mentioned as a barrier or problem in my research I can imagine many institutions working under similar conditions. The institution where I'm doing my research allows access to MySpace, Facebook, IM and they use itunes, systematically, in student education.
Students there use all of these media on a daily basis. As for lecturers and library staff...