This showed up on LUF.
"Brew A Pot Of Developer
Caffeine is one of the best, and itís simple to use. Coffee or tea can be the source, but coffee may be preferable because of its higher caffeine content. So if you want to try your own skill at kitchen chemistry processing, hereís a plan: First get a jar of instant coffee crystals at your local supermarket. Next head to the laundry detergent aisle and pick up a box of washing soda. Thatís the stuff that will activate the developing agent, the caffeine in the instant coffee. With the wide variety of laundry materials available today, washing soda isnít the big seller that it once was, but the larger chains will carry it. (Baking soda just wonít do.)
Thatís all you need. And hereís a recipe for making a half pint of developer, enough to process a roll of 35mm film in a typical developing tank.
8 oz of water
4 teaspoons of instant coffee crystals
2 teaspoons of washing soda
Stir the ingredients until uniform, then develop film for 25 minutes, agitating every 30 seconds.
This simple formula will develop any silver-halide emulsion, but for best results youíll need to experiment to determine the optimum composition and development time for the particular film and exposure level you use. I used only Kodak T-Max 400, exposed at ISO 100."