A friend of mine, Bentley Christie, has been espousing the concept of continuous flow worm composters, and has developed a number of such designs. I love this low tech, no cost worm bin the best. As food scraps build up in the pants, the worms move higher up in the “bin”, allowing you to periodically empty the castings from the two legs. No dumping the bin, separating the worms, and starting over. Just keep adding food and some bedding material, and harvest the great compost. Put a bucket under it to catch the liquid fertilizer that plants love so much. You will have to keep this process moist, as there is a greater chance for it to dry out. An easy way is to process food scraps in a blender with water, and pour the “smoothie” into the “bin”.
Discuss this and other indoor gardening techniques at http://groups.yahoo.com/group/IndoorGardening/