Does your library offer self-service yet? Two articles I saw today covering the same story in the U.K. mention it:

Essex libraries embrace RFID
http://networks.silicon.com/lans/0,39024663,39167602,00.htm

Librarie lend growing support to self service
http://www.itweek.co.uk/computing/news/2192481/libraries-lend-growing-support