SAMI (Sydney university AAO MOS IFS) is a new multi-object IFU for the Anglo-Australian Telescope. It is the first on-sky application of innovative photonic imaging bundles called hexabundles, which will remove the aperture effects that have biased previous single-fibre multi-object astronomical surveys. A major galaxy survey using SAMI is now underway (http://sami-survey.org/) and has the potential to revolutionise our understanding of galaxies, with spatially-resolved spectroscopy of 3400 targets planned over the next 3 years. Scientific objectives of the SAMI galaxy survey will be outlined and I will present some early science results showing the effectiveness of hexabundles on sky and the potential of the survey.