Akiba PC Hotline stumbled across the Sapphire Pure CrossFireX AM3 790GX motherboard and the folks over at Fudzilla were nice enough to translate the important information for us.
The new board was announced with DDR2 support but Sapphire has switched to DDR3. This probably has something to do with having Jetway manufacture the board instead of DFI, as it looks almost identical to the Jetway HA07-Ultra.
The Pure CrossFireX AM3 790GX supports 16GB of memory, has an integrated Radeon HD 3300 with 128MB of dedicated DDR3 Sideport memory, and two PCIe X16 slots that operate at x8 when both are in use. The onboard video provides DVI, analog, and HDMI w/audio. The board is selling in Japan right now for about US$190.