Do we really need anything more than a 767-200? No, of course not. Hell. We don't need aircraft, period. The world survived just fine for billions of years without airplanes.
Enough with the sarcasm
I think the -600, -500 variations of the A340 could be a very good thing for airbus. It's the biggest bird they've got right now, something like 11 meters longer than the Boeing 747-400. It offers increased range and passenger capacity... of course airlines are going to be interested.
I think the new A318, A340-500,-600, and the A3XX will most likely bring Airbus ahead of boeing, as far as orders are concerned. The folks over in Toulouse seem to be concerned with development right know, instead of marketing and gathering firm orders. Y'all just watch. In a year or so, folks at Boeing will be on their ass wondering how the hell they can catch up to the boom in tiny-haul and mega-haul aircraft.
Airbus seems to realize that the 767/757/737/A319/A320/A321 market has been beaten to death already. They're expanding both ends of the spectrum.