There has been talk from Airbus of a freight version of the A340-200. What I am wondering is how this would stack up against the MD11F, which seems very popular with freight operators. Which would offer the best payload capability, efficiency, and range (I am assuming the A340 for the latter, but who knows...)? I know that the MD11F has a wider fuselage, but then again, operators such as FedEx and UPS use the A300F with their standard containers, so this shouldn't be much of a limitation, if anything, it makes for less wasted space.
While on this topic, another thought comes to mind: why do Airbus not make a freighter of the A340-500 instead. It would offer a better payload capacity (both volumetrically and by weight), while being long range. There is a fair ammount of range which could be traded off for even more weight, making it a very nice freighter. It would also add a sales boost to the Trent A340 family. Just my 2¢!