As of 11/04/14, Xively has discontinued their support for this Jumpstart kit. You can still get the mbed boards from us here.
Xively Jumpstart Kit: ARM® mbed Edition
Xively and ARM have partnered to provide you the hardware, software and services you need to accelerate your ideas into connected products. The ARM mbed starter kit is available today and has everything needed to prototype and connect to Xively Cloud Services™. ARM mbed is a rapid development platform for ARM-based microcontrollers with an online IDE, community and cookbook of ready-to-go hardware and libraries. In this tutorial, we will connect the mbed LPC1768 board to Xively, and log a few values over an ethernet connection to test our connectivity.
Xively Jumpstart Kit: ARM® mbed Edition (0:28)
Xively Jumpstart Kit: ARM® mbed Edition (0:05)
NXP LPC1768, ARM Cortex-M3