Dear N3Summit speaker, We are pleased to announce that the technical program for the *Third NaNoNetworking Summit* which will be held in Barcelona, Campus Nord of the Universitat Politécnica de Catalunya (UPC) on June 22-23 2011 will be ready soon. In the meantime, please find a preliminary version of the program of the Third NaNoNetworking Summit at the following link: * http://www.n3cat.upc.edu/n3summit2011/program.php You are cordially invited to check your assigned time slot and let us know in case there is any problem. We also take the opportunity to kindly invite you to register through the following link, in case you did not do so previously: * http://www.n3cat.upc.edu/n3summit2011/registration.php Looking forward to meeting you next June 22-23 in Barcelona, N3Summit organizing committee