TerraTec Cinergy T2
The TerraTec Cinergy T² is a small buspowered USB2.0 highspeed DVB-T device sold in german media markets since october 2004. Onboard IR Receiver, delivered with antenna and remote control.
Fully supported by the cinergyT2 Linux driver. Remote control and antenna shipped with the device are not really perfect but can easily get replaced, the receiver is able to decode NEC/Toshiba and RC5 remote control signals.
Open Hardware and Firmware
Because the device went out of production, the schematics and full firmware sources have been released: