This site (http://www.sydneyoperahouse.com/sections/tours/virtual_tour) is a good example of an interactive virtual tour of a large facility. Combining the functionalities of the computer catalog, the virtual tour and Radio Frequency Identification (RFID http://www.rfida.com/walmartrfid.htm) would allow a user to see the location of the physical book regardless of its location. This also relates to a previous discussion we had on "Browsing Opportunities." Lin