This is an interesting example of virtual reference in action, even though it isn’t a librarian answering the questions
http://sylloge.typepad.com/questions/
I must say, I’ve only gotten questions like this a couple times in virtual reference. Most of the questions I’ve gotten have centered around people not really knowing where on their library’s web page to click in order to find the information that they needed, sometimes the questions will be more in depth like helping someone get started on a research paper.