For those who like powerful controllers this new Atmel that can run linux looks really impressive, and its only $69!
for a quick rundown
http://www.linuxdevices.com/news/NS2837651365.htmland the official site
http://www.atmel.com/dyn/products/tools_card.asp?family_id=682&family_name=AVR32+32%2Dbit+MCU%2FDSP&tool_id=4102some features:
ATtiny24 board controller interface
Serial interfaces include RS232, USART, I2S, AC97, TWI/I2C, SPI, PS/2, and several synchronous serial modules (SSC)
16-bit stereo audio DAC
2048x2048 pixel TFT/STN LCD controller
high-speed USB 2.0 "B" client port with on-chip transceivers (PHY)
two 10/100 Ethernet MACs
Bridging between interfaces that run incompatible serial protocols
Routing/filtering of traffic between two TCP/IP networks
Routing/filtering data between TCP/IP, USB, and SD cards