I just learned of this terrible thing myself yesterday and hopefully the info I'm passing along is as acurate as it was portrayed. (I hate to encourage an urban legend!)
Over at the ropejock site it was reported that Kuj was injured when a piece of the wall fell on him after he helped his 4th(!) person out of the building. He had some internal injuries and was trapped for a day before being found. Plus he had given his cell phone to someone to call for help and it ended up on a person who was killed so he was identified imediately. The good news was that he was expected to make a full recovery, although he didn;t know when he would be back to full strength.
Again, I am only repeating what I read. However I hope for the best. Kujman is one of the godfathers of this group (and several others) and I wish him well.
~ toyou