Embedded artists have just launched a new breakout board for EUR69, which will be mbed compatible. Unfortunately it looks like it won't ship in time for Christmas.

http://www.embeddedartists.com/products/lpcxpresso/xpr_base.php

Common features

• Socket for LPCXpresso and mbed module

• 50 pin expansion dual row pin list connector (male, 100mil pitch) for simple connection external designs and to a logic analyzer

• 50 pin expansion dual row header connector (female, 100mil pitch) for simple connection to breadboard

• Battery powering (small coin battery)

• USB interface

• Reset pushbutton

Digital IO

• RGB-LED (can be PWM controlled)

• 5-key joystick switch

• 2 pushbuttons, one for activating bootloader

• Rotary switch with quadrature encoding (timer capture)

• Temperature sensor with PWM output (timer capture)

Analog IO

• Trimming potentiometer input (analog input)

• PWM to analog LP-filtering (PWM output and analog input)

• Speaker output (PWM output)

• Oscilloscope probe inout stage

Serial bus - SPI

• Shift register driving 7-segment LED

• SD/MMC memory card interface

• Dataflash SPI-NOR flash

Serial bus - I2C

• PCA9532 port expander connected to 16 LEDs

• 8kbit E2PROM

• MMA7455L accelerometer with I2C interface

• Light sensor

Serial bus - I2C/SPI shared

• SC16IS752 - I2C/SPI to 2xUART bridge; connected to RS232 full-modem interface and one expansion UART

• 128x64 pixel white OLED (alternative I2C/SPI interface)

Serial bus - UART

• USB-to-serial bridge, with automatic ISP activation

• RS422/485 interface, connected to DSUB

• Interface socket for XBee RF-module

Specific mbed module support

• CAN bus interface (can be simulated with LPC-Xpresso), connected to DSUB

• Ethernet RJ45 connector with integrated magnetic

Dimensions

150 x 180 mm

Power

Powered via USB (+5V)

Wow, this vastly simplifies getting everything connected