The HTC HD2 may soon be available with a side-sliding keyboard. Or so says Xmoo, a ROM collector, who has found evidence for such a HD2 version.

Just as with Conflipper finding evidence of potentially new HTC Windows Phones, Xmoo has found evidence in the registry keys of a new HD2 ROM that support a slide-out QWERTY device.

This is purely in the speculation/rumor stages. However, adding a keyboard to the HD2 is an interesting concept. If this develops into reality, you can only hope HTC finds a way to keep the increase in thickness the keyboard will bring to a minimum.