Ember announced next-generation high performance, low power ZigBee SOC chip based on Cortex™-M3 core.
By replacing XAP2 core found in the current generation of chips Ember is going after more open architecure
for smart 802.15.4 based networks.  It will be interesing to see how this new chip compares to the Freescale's
ARM7TDMI based MC1322x.

Ember press relase