There doesn't seem to be a dedicated mushroom topic, surely a grave oversight. I did start one a while back about mushrooms in China, but that is a niche interest.
So how about a mushroom emporium of favourite recipes, favourite mushrooms, favourite mushroom cookery bookeries, mushroom tales, mushroom tips and trivia?
I'll start with this link to a selection of Ottelenghi's mushroom recipes.
And a link to my favourite mushroom cookbook. Jane Grigson's Mushroom Feast.