I've just got back from a holiday in Dubai and I think this debt issue is somewhat overrated. Dubai is part of 7 emirate states and doesn't happen to have any oil. Many of the other states (UAE) are major oil exporters and will not let it fail. It is sort of the Las Vegas of the desert, minus the massive casinos and strip clubs. I went to Atlantis, The Burj and many other places while I was over there and they have created projects on an absolutely amazing scale.
The unfortunate thing is lots of skyscrapers out there seem to be under construction (as always). It was certainly some poor planning on the part of the government but they still have some of the best infrastructure and facilities in the middle east. It is also one of the safest and free Islamic countries in that area, as long as you don't piss off an Emirate (citizen). By the pure fact that they now have all these facilities in place, it will be a big hub for the middle east for quite some time.
You should definitely not believe everything you read in the newspapers because I can tell you now, it's still as thriving as ever.