Mark ''Bigfoot" Olsen is working on the G5 Power mac port right now.
Here is an update Piru posted.
http://www.morphzone.org/modules/news/article_storyid_1989.htmlConsidering this was posted in December, my guess is that the release will occur soon.
Mark is also working on a 3D driver for the Radeon R300 series GPUs (which are supported in 2D right now).
So, in anticipation of the software, I've purchased a G5 and equipped it with a Radeon 9800 card.
Current models antciipated to be supported are the air cooled 2.0 and the water-cooled 2.7, but may include additional models.