Anyone interested? They recently cleaned up their PPC branch, though it's still way behind x86. Personally, I think it would be a great OS for people who are a little less comfortable with command lines, and I enjoy using it too for how simple it is, how fast it is on my Pentium M laptop, and how it doesn't recognize its panel and lets me use it at 85 Hz. Hardware support isn"t amazing, however.
I recognize their PPC efforts are focused around Macintosh, but there was a little bit of talk about OpenPOWER hardware on their forums and the response was basically "the only reason it couldn't be done is nobody's doing it".