I now think that the DealExtreme unit is, perhaps, an updated Cyclone:
with a newer technology LCD and, perhaps, a different (and better) game emulator (or emulators) in the firmware. The chipset probably used, the Sunplus SPMP3050A:
should be capable of much more in the gaming area than is managed with the Cyclone. The chipset has a 168MHz ARM926EJ and a 2D hardware accelerator so, with a proper emulator in the firmware, good SNES emulation should be possible at least. With the Cyclone, it's probably the emulator in the firmware that's holding it back with SNES titles.
The mention of 32-bit games in the DealExtreme ad is what makes me think that they might be taking better advantage of the SPMP3050A in their firmware and their "High Clarity 2.5- inch TFT screen" comment is what makes me think that they're using a newer-technology LCD compared with the 2.4" LCD on the Cyclone.
I have not seen this particular model/design anywhere other than on DealExtreme. Anyone seen it anywhere else?