This paper presents the most recent progress and implementation of the NILDE (Network Inter-Library Document Exchange) system, a web based document delivery (DD) software for libraries and end-users. NILDE allows libraries to manage the entire workflow of DD activities, both borrowing and lending, through the provision of synthetic and analytical statistics, DD performance indicators such as "fill-rate" and "turn-around time", and support for secure electronic delivery. New technologies, referred to as Web 2.0, have been incorporated into NILDE, making it an even more user-oriented and friendly tool for document delivery and scholar work.