Because of the shortage, I ordered a couple of iPhones directly from the online Apple Store last Monday. I figured if they were introducing a new model then they'd bump my order up and, if they weren't, they would send me a couple of phones once new stock came in. I just received notice that my 8gb iPhones shipped today. The part number is the same, so they aren't making any changes. I think this confirms that new phones aren't coming until June or later!