Kate O'Sullivan is the new owner of café Pónaire in Newport, County Tipperary - a café at the front, and behind it a roastery that roasts every bean the business sells. Prices in Brazil for beans peaked early last year at nearly four and a half dollars a pound. It's eased since. But the warehouses are emptier than they've been in years, nobody in the trade will tell you where it goes next, and the cup you buy on the way to work has not got any cheaper.