NewMobile.com has managed to get their hands on the HTC S740 at the German IFA 2008 Consumer Electronics Exhibition exhibition. The smartphone is still in development, but NewMobile has posted early impressions of the hardware. They mention the keyboard is good, similar to the HTC Touch Pro, and that, unlike the Diamond, the device is not glossy in front. The back however has the same glossy appearance, and is therefore a major fingerprint magnet.
They also mention, unlike the Touch Pro, the device is significantly thinner that its predecessors. The software is still in early development, so we can hope HTC does something more creative than the Sliding Panels interface which is default on Windows Mobile Standard.
See many more pictures at NewMobile.com