Has the MAP (Not the MAF) sensor been checked?
If the car is starting (no smoke), idling ok, reving ok in neutral and just has no power/boost on the move, I think we have pretty much exhausted all of the possible options, its either the engine is not getting the fuel/air to produce the exhaust gas to drive the turbo, the turbo or wastegate itself is goosed, or there is a restriction somewhere.
Cheers Iain