HTC has announced through its Twitter feed that says that although it "looked into it," it has decided that by the time the HD could be converted and imported into the US, the device would be "old news".
It is promising "other cool stuff" later down the line, but gave no details on what this involved.
The phone can theoretically support American GSM and EDGE networks, but would likely require conversion of its 3G support to work on networks like AT&T’s.
The HD’s 3.8-inch touchscreen display is capable of resolutions up to 800×480 – substantially higher than most phones in North America, including the iPhone.
Among the various other theories being put forward for the decision is that AT&T demanded that the HD be kept out of the US to prevent any competition with the iPhone 3G.