Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
It seems lots of Atom motherboards have only PCIe 1x, but PCIe 16x could be intersting for additionnal card (tuner, sound..)exemple :Zotac motherboard exists with PCIe 16xhttp://www.zotac.com/index.php?option=com_wrapper&view=wrapper&Itemid=100026&lang=enAsrock A330IONhttp://www.asrock.com/mb/overview.asp?Model=A330IONEDIT : it seems in fact that the speed is limited to 1x ! (250 MB/s)
Both the D510 and the Asrock 330 are well known here...search the threads for them.