Dear colleagues, This is being sent to the LC mailing lists of the three regions and is an invitaion to join the GLD detector concept study for the linear collider. It exploits the large radius of calorimeters to obtain good jet reconstruction capabilities while focusing on cost-efficient ECAL. If you are interested in contributing to this study, please sign up at http://ilcphys.kek.jp/mail/lcdds/ Best greetings, GLD contact persons : Hwanbae Park Ron Settles Mark Thomson Graham Wilson Hitoshi Yamamoto P.S. The name 'GLD' is now 'official'.