I love the fluff and concept. The racial traits look pretty balanced, though I'm not positive (I don't have the time to test them out right now). They fit the theme really well. You should put in a special note about the effects of fire damage on trufflefolk.
Did you draw that picture yourself?
The nickname "trufflefolk" got me thinking. Do they really taste like truffles? If such a rumor was started (true or not), the trufflefolk would quickly be targeted by the gourmet community. Truffles are in high demand, after all.