1 Agent-based Middleware to access Multimedia Services in a GRID Environment D. Bruneo, A. Zaia, A. Puliafito Universita’ di Messina, Dipartimento di Matematica Contrada Papardo, Salita Sperone 98166 Messina, Italy e-mail: {dbruneo,azaia,apulia}@ingegneria.unime.it Corresponding Author: Dario Bruneo - Tel.: +39 090 3977343; Fax.: +39 090 393502; Email Address: dbru- neo@ingegneria.unime.it DRAFT