  By combining the first year data from the Supernova Legacy Survey (SN LS) and
the recent detection of the baryon acoustic peak in the Sloan Digital Sky
Survey data, we are able to place strong constraints on models where the cosmic
acceleration is due to the leakage of gravity from the brane into the bulk on
large scales. In particular, we are able to show that the DGP model is not
compatible with a spatially flat universe. We generalize our analysis to
phenomenological toy models where the curvature of the brane enters into the
Friedmann equations in different ways.
