The information probably comes too late, but it's always worth to make a dummy booking through www.travelgalileo.com (you have to choose a travel agent first) and have a look at the seatmap if it's offered by the airline. Olympic A340 seemed to be a 2-class configuration: 7 rows (2+2+2) in business and 2+4+2 in eco, two exit rows in eco (first row number 7 and another. many rows in eco. This solution won't give you any details on location of galleys and lavs.