In-camera digital filters...
Just remembered this posting! Seems like Fujifilm took up the idea (well, not necessarily because of this thread) and added such digital filters in X-series cameras film settings e.g. X10:
Monochrome + Ye Filter - Take black-and-white pictures with slightly increased contrast. This setting also slightly tones down the brightness of the sky.
Monochrome + R Filter - Take black-and-white pictures with increased contrast. This setting also tones down the brightness of the sky.
Monochrome + G Filter - Soften skin tones in black-and-white-portraits
And as for the X10, this seems to be a good move as the filter thread is slightly non-standard (39.5 mm) - software more flexible...
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