With the price and availability of ITX systems coming down, the A330ION motherboard from ASRock is a decent choice for a quiet, Home Theatre PC or web-connected computer.  The A330ION board supports four SATA devices internally as well as two eSATA devices, a bunch of USB ports and HDMI, DVI-D and even a VGA port.  If you have some extra DDR3 and a hard drive lying around, it makes a cheap system that can get a lot of little jobs done. . .