Smallest, cheapest Banana Pi yet ships for $23

SinoVoip has launched an open source “Banana Pi M2 Magic” SBC with a quad -A7 Allwinner A33, WiFi and BT, a 40-pin RPi header, and a 51 x 51mm footprint.

Specifications listed for the Banana Pi BPI-M2 Magic include:

Processor — Allwinner A33 (4x Cortex-A7); ARM Mali-400 MP2 GPU
RAM — 512MB DDR3
MicroSD slot
Optional 8GB 16GB, 32GB or 64GB eMMC
Wireless — 802.11b/g/n and Bluetooth 4.0 BLE; antenna connector (AP 6212)
Multimedia I/O:
4-lane MIPI-DSI out
3.5mm audio jack
Onboard mic
Other I/O:
USB 2.0 host port
Micro-USB 2.0 OTG port for power
40-pin, RPi-compatible header with 28x GPIO, including UART, I2C, SPI, PWM, etc.
Other features — 3x LEDs; reset, power buttons
Power — 5V/2A DC jack; 3.7V lithium battery support; AXP223 PMIC
Weight — 40 g
Dimensions — 51 x 51mm
Operating system — Debian, Ubuntu, Raspbian image, etc.; Android