TI has announced their new series of development board Beaglebone Black for 45$ .

http://beagleboard.org/

Below the specification of the board:

RAM - 512MB DDR3600 Mhz

Flash - 2GB & SD card

Processor - 1Ghz AM3359

Ethernet10/100 Mbs

USB1 client1 host

Video - HDMI

Audio - Via HDMI

Periperals - SPI, I2C, SPI, CAN, Timers, LCD, MMC, Analog