On his website when he says he has hired people to help him fill orders he means he has been calling in personal favors on short notice from his friends and having us all go over to his place on the labor day long weekend to stuff teensy's in boxes. He had to buy another printer just to keep up with the labels. I assure you though, if you were able to order it is indeed coming.
He's a good guy that cares about his customers, he was just taken off guard. It's like he went to the sink to get a glass of water and someone replaced the faucet with a fire hose.
Don't worry, if you have ordered it will be there soon. Paul is just... overwhelmed... by the unexpected demand for the Teensy. If you were able to order it DOES mean he has it though. He deliberately stopped taking orders because he did not want to be put in the position of taking an order for a product he does not yet have built. Since he has had no time to even count his inventory, he is erring on the side of caution by listing it as out of stock.