Anandtech finally has a detailed review of AMD's new E-350 technology. The verdict: better and less expensive than Ion 2.
Asus has a fanless motherboard due out soon but with what appears to be a high pricetag of €150. It's technically fanless but their Ion 2 board had an identical heatsink and ran really out - you would need a case fan.
We are also testing a fanless Nano-ITX fusion board.