Intel DC3217IYE Intel QS77 Chassis: Aluminum and Plastic Black Next Unit of Computing Kit

Pros: This is a pretty nice little box. It is extremely small; it's roughly the size of your average paperback. Comes with a VESA mounting bracket so you can attach it to the back of a monitor that has the necessary attachment points.
Has an external power supply adapter, but be warned: it doesn't come with the power cord. You will need to get this cord as well:
http://www.newegg.com/Product/Product.aspx?Item=9SIA07R07Z3303

Has no wireless adapter, which was fine with me as it had a built-in 1Gbit port.

I picked up this system, 16GB of Crucial DDR3-1333, and a 256 mSATA Crucial drive. Once everything was put together, system booted up and Ubuntu 12.04.1LTS worked without issues.
Performance is pretty good considering the CPU used.

Perfect if you want a low-power desktop or test environment that won't be as gimped as a Atom or similar.

Cons: C5 power cord not included as mentioned above, so make sure to order it at the same time (or have one laying around) or you won't be able to power it on. Not a big deal, but should probably be mentioned in the item description, so that folks are aware of this.

Overall Review: I'll be using this system as a test environment for virtual machines.
ESXi 5.1.0 doesn't work on this system because it can't detect the network interface (probably the chipset may be too new and drivers aren't included in the ISO).
Ubuntu 12.04.1LTS works, and KVM modules work without issue. Install from USB thumbdrive or a USB CD drive, either way works.

rubik:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS"
root@rubik:~# uname -a
Linux rubik 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Pros: I needed a really small device to be placed in a small room that only had a small area under the cabinet so this was perfect. I picked up 16gb of ram and a 180gb drive and installed win 7 pro without any issues. It's been working great and would boot in less than 30 seconds.

Cons: Then the until wouldn't boot. I powered it off a few times and it eventually booted, but the next time I turned it on nothing.

Tech support asked to remove the cmos battery connector and nothing. Removed all ram and drive and nothing. Tried to force it to boot into bios and nothing. Device is dead. Spent the next 3 hours (hung up on twice and sat on hold for up to 30 min each time) to get an RMA.

Overall Review: None