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I ordered the following item and have began building an operating system for it before the hardware has even arrived:
httpv://youtu.be/8j5ZFlJB7eo
The exact make and model I have purchased is a MK 809 III; $62.99 on ebay the specs:

Quad Core MK809III RK3188 Cortex A9 4.2 Androind MINI PC TV BOX Pre-installed XBMC 2GB/8GB
MK809 III RK3188 Quad Core Cortex A9 MINI Android 4.2 PC 2GB/ 8GB ROM 1.8GHz WIFI Bluetooth

Quad Core MK809III RK3188 Cortex A9

Features:
Operation System: Google Android 4.2.2
Wi-Fi Internet connection
HDMI Out 1080P
Adobe Flash 11.1 Support
Rockchip RK3188 1.8GHz Cortex A9 Quad Core+ Mali400 GPU Quad Core
2GB RAM 8GB ROM
Google Play, Thousands of apps available
Remote controller / Wireless Keyboard/mouse supported
YouTube, Hulu , Internet Radio, etc. Online video Playing
Facebook, Twitter, Picasa, Flicker, Google+ etc. Social Networking
Gmail , PDF Reader, e-Book Reader Office To Go
Supports multi-language: Arabic, English, French, Italian, German, Spanish, Portuguese, Greek, Dutch, Danish, Russian, Polish, Norwegian, Swedish, Czech, Turkish, Chinese, Korean, and Japanese ect .

More on the progress here.