This document discusses emerging technology trends in libraries, including social networking, mobile devices, geolocation, and virtual worlds like Second Life. It focuses on how Second Life can be used for virtual reference services, describing what Second Life is (a 3D virtual world), examples of libraries involved, and considerations for providing reference in Second Life like access requirements, the learning curve, and intellectual property issues. The document highlights the UCLA Library's presence in Second Life, including building partnerships and collections, enhancing services, and promoting their role through their virtual reference librarian HypatiaDejavu.