Two machines - a MB Pro and a Mac Mini. One printer - an HP 1015 LaserJet.
It doesn't seem to be listed in the standard drivers - but with a little help from linuxprinting it will work.
- Head to http://www.linuxprinting.org/macosx/hpijs/
- Grab both hpijs-foomatic-2.0.2.ppc.dmg and espgs-7.07.1.ppc.dmg and install both
- Add a printer using the HP LaserJet 1015 Foomatic/hpijs driver