I'm more more inclined to use alternative chems for paper developing than film. I guess I'm just too afraid of ruining the raw material for printing. Also, the results on the print are readily apparent and can be applied to virtually any good negative. I have had some pretty good (if inconsistent) success with printing using Caffenol. In the case of Caffenol, the effect is more like that of toning developers.

If you're interested, here is an article I produced following my experiments with printing in Caffenol:
http://tomoverton.images.googlepages.com/caffenol

Cheers,