That is an interesting method. I had a quick play (adjusting it for use on The GIMP, where you use levels rather than curves to set black, grey and white points). One note is that the details of the tutorial matter a lot. On my first attempt, it came out looking very extreme; on the second go, with a bit more care, the result was much more pleasing.
Wulf
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Wulf Forrester-Barker << Sites: blog / flickr >>
Gear: Nikon D40, Nikon AFS 18-55mm f/3.5 - 5.6G, Nikon Series E 50mm f/1.8, Nikon AF 70-300mm f/4-5.6G, Vivitar 90mm f/2.5 macro, Raynox DCR-250, Lensbaby 2.0k, SB600
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