J'ai trouvé une autre console en construction : http://wiki.virtualcogs.com/tiki-view_blog.php?blogId=1.

Virtual Cogs Embedded Systems Inc. is proud to announce the official release of our newest product, the PC COG. Formally known as the Portable Computing/Gaming COG, this new device will serve as a great platform for developing portable gaming consoles, mini computers, smart phones and PDAs.

A stackable system based around the Freescale Semiconductor i.MX21 multimedia ARM9 processor. This SBC measures only 2"x1.75" in size and features 64MB SDRAM, 16MB of FLASH memory, onboard USB and is compatible with any of the Virtual Cogs VC21 series accessory boards.

Specifications
* Linear battery charger with LED charging state indication and dedicated power jack
* Removable Li-ion battery (not included but required)
* i.MX21 controlled power switch to control power to the stack
* 4.3" 16:9 Color TFT LCD with 480x272 pixel resolution
* Touch screen interface for LCD
* Mini-SD card interface
* Two mini-joysticks (digital), two shoulder buttons and six other general-purpose buttons
* Audio CODEC with 16/20/24/32-bit 97-dB stereo playback and mono record up to 48ksps
* On-board microphone
* Stereo amplifier and speakers
* Audio-in jack (to connect an external microphone)
* Audio-out jack (for headphones)
* Built-in temperature and battery voltage measurements
* Optional enclosures with 2 depths (0.6" and 1.1")

J'ai pas tout copié, il y en a des pages !!
Je ne sais pas si Evildragon et craigx sont au courant, mais ça ferait sans doute avancer leur projet.