Debian, Fedora, Ubuntu, Gentoo all have PPC versions available. That or you could simply cross compile a system to use the ppc architecture. 

All the best,
Robert Keizer

On Fri, Nov 26, 2010 at 7:56 PM, Kevin McGregor <kevin.a.mcgregor@gmail.com> wrote:
I noticed (what used to be) MacHelper is advertising eMacs (refurbished, of course) for $99. Just of of curiosity, what would be the most recent version of Linux that will run on these PPC-based machines?

Kevin

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