Can You Install Linux on Mac HFS+ Filesystems?

Stu asks: "I've been thinking about giving my faithful old PowerMac 7600/120 a little boost, and also thought it would be nice to give Linux a go, especially to try out the GIMP as an alternative to Photoshop. I've noticed over the past year or so quite a lot of distibutions have popped up which install in an MSDOS partition and can be launched from within Win95/98 or MSDOS, like WinLinux and many others. I'm shying away from repartitioning my HD and installing LinuxPPC as of now, but I'd like to kinda dip my toes in the water before I take the full plunge, so my question is: Does anything similar to WinLinux and those other distros exist for the PowerPC platform, i.e. can install in an HFS+ partition alongside MacOS?"