@Robusto.
The no update is aggravating to say the least! It is hard to plan your future like that, and I would say it may not be good to turn down a job.....however like you I had no update in November as was promised and all of a sudden had job offer late December. This followed closely to them advertising 777 Decs on website. Now they are advertising for 320 Decs....you may already be in the pipeline. Just something to consider and maybe you can try to contact them if you really need to make a decision.
@Dacosta
I am not sure but I "think" that Qatar Airways and Qatar Executive recruitment are linked together...I am basing this off of my interview experience when the recruiters asked the group...Do we have anyone here today from the executive side?