This stack realy very big using futures security+mesh routing.
How I see this problem:
Now freescale trying to create new 32-bit based chip for zigbee whith big onboard flash and ram. This chip will apear in dec-07... BeeStack will be successfully ported to this new chip:-). When this new chip apear users will study new stack very well, thus new products will be able vary soon in 2008.
MC13213 will only be good for end devices or for smac-projects, not more:-(
This is a marketing.
PS: in CodeWarrior: how can I find out output code size before loading it to the board?