The two PDS releases for the first six months of 2011 contain lots of images of Saturn, including observations of the great storm. The images obtained in February and March are particularly interesting. Here is a false color image processed to bring out various details and 'color' differences:
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This is a composite of MT3, CB2 and MT2 wide angle images displayed as red, green and blue. The images were obtained on March 21, 2011 from a distance of 883500 km from Saturn's center. The images are part of a multifilter sequence covering this area of Saturn's northern hemisphere - mosaicking is not possible though since the sequence did not include coverage further east (otherwise I would have created a mosaic).