  We analyze the cumulative data from the latest SNO, KamLAND and other solar
neutrino experiments in the standard scenario of three oscillating active
neutrinos. We determine the solar neutrino oscillation parameters and obtain
new bounds on $\theta_x$. We also place constraints on the fraction of
oscillating solar neutrinos that transform to sterile neutrinos with the $^8$B
flux normalization left free. Concomitantly, we assess the sensitivity of
future data from the SNO and KamLAND experiments to $\theta_x$ and to the
sterile neutrino content of the solar flux.
