I found this forum [0] that lists Android USB sticks, which are more portable than the Ouya, and cheaper. This "Tronsmart CX-919 Quad Core Google Android 4.2.2 OS Rockchip RK3188 Cortex A9 1.6GHz Mini TV BOX Dongle HDMI HDD Player 2G/8G BT/HDMI/External Wifi Antenna-Blackis" is $65 [1].

[0] http://forums.redflagdeals.com/android-tv-stick-convert-norm... [1] http://www.geekbuying.com/item/Tronsmart-CX-919-Quad-Core-Go...