A device with the minimal hardware resources required to accomplish rooter
goals, which could be implemented with as little engineering as possible. This
would be very similar to the $90 open hardware BeagleBone development board;
than design could be copied and extended.

 - Core
    - ARM SoC, probably BeagleBoard-compatible device
    - power management/regulator IC for SoC
    - 256MB RAM
    - No onboard FLASH, 2GB+ uSD card
 - WiFi
    - Atheros ath5k-compatible WiFi bg baseband, radio
    - Antenna connector
    - regulator/powermanagement
 - 802.15.4 
    - all-in-one chip, trace antenna (?)
 - Ethernet
    - PHY IC
    - Single 10/100mbps jack (w/ LEDs)
    - Connectors with LEDs
 - Power
    - 5/12v regulator, ~1amp
    - Power connector
    - Reverse voltage diode
 - Second SD or uSD connector (for expansion)
 - status LEDs and drivers (PWM from SoC?)
 - reset button
 - power switch