It is hard to get students to refer questions. Lots of time is spent on training. Reorganization at the University of Maryland to one library resulted in doing way with paraprofessionals. ACRL is planning a panel discussion on the topic. Friendliest students sometimes end up being the most trouble, because they are so eager to help.
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The reference desk staffed by a couple of paraprofessionals with special training. Professional librarians and paraprofessionals staff the information desk. Library Science students and interns are used. Simple questions are not always as simple as they appear. A reference librarian needs to interface with the community or lose contact with clientele.