Within that petite body, is a dual-core 1.66GHz Intel Atom D510 with NM10 Express chipset and Nvidia's next-gen Ion with 16 CUDA cores and 512MB DDR3 VRAM. It seems the HD-ID11 might be sold as a barebones system (sans RAM and HDD), but there is a single SO-DIMM slot with support for 1GB of DDR2 800MHz RAM, and a 2.5-inch bay with SATA 3Gb/s.
Connectivity options are aplenty, including HDMI, dual-link DVI, VGA, six USB 2.0, eSATA, gigabit Ethernet, 802.11b/g/n, a six-in-one card reader, and headphone/mic jacks. The HD-ID11 will run your choice of Windows XP, Vista, 7, or Linux. It's worth noting that the system is bundled with a VESA mount in case you want to stash it behind your display.
Zotac hasn't yet mentioned a price or availability.