  We give the present status of the beta-beam study, which aims at producing
intense nue and antinue beams from the decay of relativistic radioactive io ns.
The emphasis is put on recent technical progress and new ideas. The expected
performances in terms of neutrino mixing parameters theta13 and CP violating
phase delta using a megaton water Cerenkov detector installed in the Frejus
underground laboratory are shown to be excellent, and the synergy with a a
companion SuperBeam is underlined.
