A GSM version of HTC Touch Diamond handset could be available in the North American market before the Christmas Holiday Season reports Digitimes quoting a Chinese newspaper as source.

The HTC Touch Diamond has passed the FCC already.

Initially HTC only planned a CDMA version of the HTC Touhc Diamond compact Windows smartphone.
More details on Digitimes.

The HTC Touch Diamond is defined by its compact size, Internet and its new 3D touch interface called TouchFLO 3D.
TouchFLO 3D provides animated access to people, messaging, email, photos, music, weather and more. In addition, HTC is introducing a new touch-sensitive control for interacting with Touch Diamond.
Other features of the HTC Touch Diamond include HSDPA 7.2 Mbps, HSUPA, 2.8-inch VGA touch screen, 3.2MP camera, 4 GB Internal Storage, 256 MB flash, 192 MB RAM, Wifi, GPS, Bluetooth 2.0 with EDR and Windows Mobile 6.1 Professional.
See also these hi-res photos of the HTC Touch Diamond.