DAN have done some work on this topic
DAN Divers Alert Network : Medical Research : DAN Flying After Diving
And the Aircrew first aid course given in Aberdeen which should be more Diving savy than most places in the UK doesn't mention it. But quite alot of the first aid courses are in house these days so I presume its the luck of the draw if the airline has had a problem with DCS before. If they have it maybe included, if not I doudt very much it will be.
It was quite a shock in Sharm the number of divers that went climbing up mount Sinai which is 2285m (7500ft) on their day off after diving 3 times a day to 20m+ for the last 3 days.