Shoot, I know there was this one great tutorial on this site a while back, but I can’t find it now! It involved creating an edge mask, converting the file to Lab mode, median and Gaussian Blur on the A and B channels, then using the edge mask to preserve detail run a tiny amount of Smart blur.
Actually, Mathias has an action which is similar to this process:
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http://www.2morrow.dk/75ppi/coolpix/actions/>