the energy required to accelerate mass, not of negligible size, to the speed of light is greater than currently contained in the universe. This is not to say that, as mattbrowne said above, spacetime itself can go faster than the speed of light. There is also the Einstein-Rosen Bridge theory, which does not allow matter to attain speeds faster than light within (i.e. light will still be the fastest thing in the Bridge) however, when compared to the speed of light outside the Bridge, any object can have velocity greater than that of light, provided one of these Bridges, which are so far theoretical, can be kept open long enough to use.