The first 42 elements of the Allen Telescope Array (ATA-42) are beginning to deliver data at the Hat Creek Radio Observatory in Northern California. Scientists and engineers are actively exploiting all of the flexibility designed into this innovative instrument for simultaneously conducting surveys of the astrophysical sky and conducting searches for distant technological civilizations. To demonstrate the wide field capability of the array, we have made a large mosaic of continuum radiation at a frequency of 1.4 GHz. The mosaic is the combination of 1-minute integrations on 350 separate pointings producing an image that is 800 square degrees in size, or 2% of the sky, and we detect several thousand sources.