dd_rescue - incredibly useful admin tool. Images partitions to file, or other partitions.
Useful on PPC because Apple's HFS+ has journals and resource forks that Linux cannot handle completely - even in 2.6.24. dd_rescue goes underneath the file system for copy/rescue purposes.
Also consider diskdev_cmds and of course, mac-fdisk, if it's not in there already.
On diskdev_cmds see http://gentoo-wiki.com/HOWTO_hfsplus
By the way - super job on PPC64 in the latest Finnix. Really fantastic. I just missed dd_rescue!