Some of you people crack me up...you are flaming on this guy for keeping a shark that will probably top out at 4ft in a 10,000 gallon round tank, but you don't flame johnptc for keeping his 3 arapaimas in a 10,000 gallon tank. Wierd.
I agree that he probably should have waited until the 10,000 gallon tank was ready before purchasing the shark, but I don't know all of the circumstances behind the purchase so it would be premature of me to jump to conclusions and start flaming this guy. Based on the pictures, it looks like the shark is still in good shape so we should applaud this guy for going above and beyond what most hobbyists would do for this shark.
By the way, cool shark, my favorite fish of all. And yes, I'm jealous.