I am a bit short on specifics about this event in San Martin del Moncayo (Zaragoza, Aragon) on November 13 and 14. The small town (village) seems to have a big mushroom tradition if I am to believe Micomoncayo site (Spanish only)
What my limited Spanish tells me is that L'Almozara 2010 celebrates the marriage of mushrooms and wines.
What types of mushrooms (wild or not) I am not sure?
Besides the week-end events, from November 5th to November 14, mushroom dishes paired with wines from Corona de Aragon are on the menu of 13 local restaurants.