We were asked to do a mushroom themed brewing demonstration for a local festival/market. 
Yes, I said mushroom. 

At first I wondered if this really is such a good idea, but because I like crazy brews I figured: why the hell not - try anything once! Then another question arose...how? Things that I can think of:

- add mushrooms to the mash (no idea how this would affect the beer, I suspect you would lose a lot of mushroom flavour)
- add dried mushrooms (maybe shredded) to the wort when it is still hot, just before cooling and pitching the yeast.
- secondary fermentation (sounds like an infection hazard)
- including other additives, like nuts or spices that would go well with the flavors.

would these be a good ideas? 
What would be good styles to use (I'm thinking stout?)

any other ideas? 

I'm interested in fun ways to include mushrooms into the brewing process, that add something to the flavour of the beer. 
I'm not interested in 'magic mushrooms' or hallucinogens.