There's a freely-available article in the most recent issue of the Charleston Advisor that describes what it's like to put together a small virtual library to support distance students:
Real Life in the Virtual Library, The Charleston Advisor, Volume 10, Number 1, July 2008 , pp. 47-48(2). As you can see, it's only a couple pages, but if you're curious about this kind of setup, it's a good read.