This is my media server which stores my media library plus other services (pxe boot server, a private apt repository). It has a TV tuner and i use TVHeadend to stream the live tv to my HTPC. It also manage the recordings. I did not build a custom case for this project, i bought it off the shelf (iStarUSA D-118V2-ITX 1U rackmount case) but i made some modifications to it.
The DN2800MT does not have a conventional ATX power supply connector. There are two ways that you can power this board, one is the external power jack (laptop type) or the internal 2-pin molex header. It accept a wide 8v to 19v voltage range and use about 15 watts.
I used a 12V 35 watts (TDK LS35-12) switching power supply. Since the chassis i bought accept a standard mini atx power supply form factor, I made an aluminum bracket to mount the PSU.
The case can accepts a pci card as is but it is only held by the i/o bracket, there is no support for the card other than that. So I made an other bracket to mount the PCIe riser :
Media server software
It runs Ubuntu Server 12.04 and TVHeadend 3.5