A couple of very interesting articles on information seeking behavior in the most recent Journal of Academic Librarianship (v30i1):

• "Factors Influencing Distance-Education Graduate Students' Use of Information Sources: A User Study" by Zao Liu and Zheng Ye (Lan) Yang. The message here is that distance ed grad students tend to follow the path of least resistence when finding information -- tending to use the net as their primary source. Also, the more motivated the student, the more likely they are to use the library.
  
• "Identifying University Professors' Information Needs in the Challenging Environment of Information and Communication Technologies" by Maria Anna Jankowska is a facinating article full of interesting details, mostly broken down by field. From the conclusion:

  The results of this survey clearly confirmed previous findings about the fact that unawareness of the range of databases, the lack of knowledge about electronic resources among faculty, lack of time, lack of training, and instruction were critical obstacles in effective use of electronic resources and services by faculty. The marketing of library e-resources and e-services should be a critical component of academic libraries' activities.