ASRock's Bay Trail-D boards come in Mini-ITX, microATX form factors
 

ASRock has put together a collection of desktop boards based on Intel's Bay Trail-D SoC. As far as I can tell, there are only two actual board designs: a Mini-ITX version and a larger, microATX variant. Each one is available with a dual-core Celeron J1800 processor or a quad-core J1900 chip. The duallie has a 2.4GHz base clock with a 2.6GHz Turbo peak, while the J1900 is clocked at a slightly slower 2.0/2.4GHz. Both chips have relatively low 10W TDPs, which has allowed ASRock to get away with passive cooling.

http://techreport.com/news/26314/asr...x-form-factors