Power PC with a linux distribution and R

This is an operating system question, but it is with the intent of
using R on that operating system.  I have an ibook G4 Power PC that I
am going to install linux on.  Is there a better, worse, or perhaps
easier (I am a linux newby migrating from mac) distribution that I
should look at.  I appreciate your help.  I didn't post this in the
sig-mac because I don't know if it fits there better than anywhere
else.
thanks

Stephen Sefick
Research Scientist
Southeastern Natural Sciences Academy

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.

	-K. Mullis