When seated the cabin layout is much like a B757; Privatair operate a BBJ for LH across the pond; Swiss World were going to operate one from GVA to Canada; RBA operated 737-200 ETOPS in the 80's, (so I heard); Tranavia sent a B737 round the world with fare paying pax. If it's got the range, whats wrong with it. 6.30hrs is 6.30 hours whether it is down to Africa, into M.East, or across the Ocean. The seating arrangement is another issue. ETOPS just makes it legal, but not necessarily comforatble. Damned sight more comfortable than Concorde, but then I've only sat in it on the ground.