The Linuxstamp is an open source processor module based on the AT91RM9200. All development can be done with the USB device port which is connected (via USB/serial chip) to the debug serial port on the Linuxstamp.

Features:
* Atmel AT91RM9200 processor (Arm9 processor with MMU, 180Mhz operation)
* 32MB SDRAM (Only limited by 1x 54-TSOP SDRAM chip)
* 8MB SPI Dataflash
* 1x 10/100 Ethernet
* 1x USB host port (allows wifi adapters, flash drives and other USB devices to be used)
* 1x SD card slot
* Serial debug port access through FTDI USB/Serial converter
* JTAG port
* 2-Layer PCB design
* POE capable (48v -> 5v Power supply can be implemented on a motherboard)

Order for USD120 here: The Linux Stamp shop