They received the following details on the device from a source:
The ZuneHD will have a capacitive, multi-touch OLED screen with a 16:9 aspect ratio and TV out, from what looks to be a HDMI port on the side. The radio will now be HD and the device will support HD media playback, which will be available from the updated Zune Marketplace.
The ZuneHD will also support 3D Xbox games, but it is unclear what form this will take.
The device will come in 16 and 32 GB versions, and will support wireless sync. It will also finally come with a browser that supports multi-touch.
It is believed that the ZuneHD will ship in September and be available to the US, Canada, UK, France, and possibly other European countries.
The image has also been confirmed by the ZUnited Zune Community site.