I think a fungi forum would be a good idea. They give the appearance of plants, people grow them, they a sign of healthy soil, they are used as compost for gardens, they help break down organic matter which improves the soil, they are use as food, and can add to the visual appeal of a garden. With all this in mind I think that even though it isn't a plant, it still fits in with the whole theme of gardening and this site.
