While Windows Phone 7 activations may only be a fraction of Android's daily half a million, sales are reported to be going well. The American AT&T network is reporting on its website that the HTC Titan has sold out. BestBuy looks to be the best bet for U.S. customers looking the Titan. If you want to know more about about the HTC Titan, you can find our full review here. You can pick up an unlocked Titan in Europe from Expansys or Clove Technology.