Zotac Thinks Extra Small with New ZBOX Nano XS
According to Zotac, the Nano XS flavored ZBOX is the world's smallest mini PC capable of delivering a high definition desktop computing experience. It's 17 percent smaller than previous generation ZBOX systems with a 106mm chassis that's just 37mm tall, plenty small enough to "easily slip into a jacket pocket."
"Size matters when it comes to desktop systems. We are always trying to push full-featured systems into the smallest size possible," says Carsten Berger, marketing director, Zotac International. "Our new Zotac ZBOX nano XS AD11 Plus shows that you can pack a complete high-definition capable desktop PC into a miniature form factor that conveniently fits in the smallest places."

As is usually the case, Zotac packs an impressive amount of hardware and features into a small package. The ZBOX Nano XS AD11 Plus comes with an AMD E-450 Accelerated Processing Unit (APU) clocked at 1.65GHz, integrated Radeon HD 6320 graphics, 2GB of DDR3 memory, 64GB mSATA solid state drive, HDMI output, two SuperSpeed USB 3.0 ports, two USB 2.0 ports, a combo eSATA/USB 2.0 port, GbE LAN port, 802.11n Wi-Fi (via included USB 2.0 adapter), 6-in-1 memory card reader, mini optical S/PDIF output, integrated IR receiver, and a bundled MCE compatible remote.

You'll need to provide your own operating system and a way to install it, such as an external optical drive or via USB stick.
We've got a full review posted on this machine here.