You might be interested in the petition we recently fired up on change.org.
"Since good old HTC Desire Z, the world is left without a new, powerful HTC device that comes with hardware keyboard. At the time of the release of such fantastic devices as HTC One X and S, we are sad to see that there's no news of a new keyboard device with qHD+ resolution and keyboard, to compete with the Motorola and Samsung devices.
HTC please consider releasing a new and modern device with superb camera, display and hardware keyboard!"
Sign it, so it might happen eventually.
Elektrey on our IRC channel has designed an 3d model of a possible form for a "HTC One Z"...
I think it pretty nicely depicts how it could look...