At a very basic level; simply running Linux on the PPC architecture, including [Apple] Powermacs and so on.

(http://penguinppc.org/projects/hw/ List of Supported Hardware)

Has both a 32 and (http://penguinppc64.org/ 64bit) flavour, and is supported by most popular distributions (Debian, Gentoo, Mandrake, Red Hat, SuSE to name a few).

Reports are good for most wireless cards, as most i386 things can be tinkered with to work on PPC.

(http://groups.google.com/groups?q=linux/ppc+pcmcia&hl=en&lr=&ie=ISO-8859-1&selm=linux-ppc.140D21516EC2D3119EE700902787664401439FE2%40hplex1.hpl.hp.com&rnum=6 Adding Wavelan/Airport/Cabletron/Enterasys PCMCIA support to Linux/PPC)

* (http://penguinppc.org/dev/kernel.shtml Latest Kernel Source)
* (http://penguinppc.org/ Penguin PPC)