This page describes the status of the Debian Port for ["PowerPC"].
Older models work without any problem.
The new model have some issues to be solved:
Sleep-to-RAM still does not work. BenH is working on it. Sleep-to-disk does work with 2.6 kernels.
It does not work and probably it will never work. It uses a Broadcom chipset and information has not been disclosed to create an Open Source driver.