You can have a look at "Intel Atom E660 development board":http://www.intel.com/p/en_US/embedded/designcenter/tools/seed-board-program
And here is our "WEC7 Atom BSP":http://www.adeneo-embedded.com/en/Products/Board-Support-Packages/Intel
ARM processors are preferred to x86 on embedded devices, as they use a RISC architecture, allowing for reduced power consumption for instance.