Apple.slashdot.org features an
interesting question by a reader, asking for a bootable "live" Linux CD for the Mac, the way
Knoppix and/or
Morphix do it on x86 (one CD with KDE and another one with Gnome, plus apps). I would like to urge
Yellow Dog Linux, the premier Linux distro for Macs (
review), to build such a version, as it would not only help their product marketing-wise, but given the reluctance found in the majority of "normal" Mac users (as opposed to power users) to re-partition their Macs and try other OSes, it should "push" and introduce these users to Linux in an easy and comfortable way.
UPDATE: I put up a poll for you, come in and vote for your favorite Mac Linux distro (vote even in case you don't own a Mac; there is an option for it).