Have a look at this thread....if you are looking for a stand alone versus a rack mounted case....
http://cocoontech.com/forums/topic/24657-16-hard-drives-1-case/
Today I have multiple NAS boxes including one which is a 1U rack mounted hot swap set up. It is large and very loud though.
Two of the NAS boxes are built into standard cases with 4 to 3 hot swap drive cages which have big footprints and standard motherboards in them. I am reading now that you can also purchase 5 to 3 drive cages for DIY's.
The last one I built was a DIY and was an 8 drive hot swap including motherboard set up. Very tiny and functional.
I got the case from China and it was a bit under $200.
It was an 8 drive hot swap case with a built in side mounted mini-itx board. A DIY using an AMD mITX board and an IBM SATA 8 port modded M1015 card. It was built only to be a NAS box and nothing else. The same company sells 4-6 mini-itx cases. It is very quiet and utilizes a standard rack style mounted power supply.
TV streaming/recording (I don't watch TV though) is coming from an Ubuntu headless combo MythTV / Squeezebox server talking to Aopen digital engines (and other devices) connected to the LCD TV's running XBMC these days. Last week tested an atom based "do what" table top combo (DECT phone thing) with a Broadcom Crystal HD card in it to stream HD live video and it works great.
Attached are pictures of the NAS cases sold by the same company and the one I purchased. Personally I liked the small footprint of the case. Its easy to build and the case is well constructed.
BTW the company I spoke to when purchasing this drive was looking for more business and they were very friendly.
I could probably do a group buy of a number of these cases at a very reasonable cost should their be an group inclination for a DIY NAS box / case. It would be also something good for CT here as it would be an inclusive to CT forum users only not available anywhere else domestically.