For those confused by that statement,
@LightBulbFun (project master), Bunn,
@tevion5,
@MacCubed,
@iModFrenzy,
@128keaton and I (all members of my MR iMessage Group Chat) are all actively working on hacking Leopard 10.5.8 onto NWR G3s. We are attempting to use the .kext files from the early OS X Leopard WWDC 2006 Preview (which could be run on a G3 natively) and combining them with the kexts from 10.5.8 to allow it to run on a G3.
@LightBulbFun can do a more thorough writeup of the project and probabaly do a better job than me of explaining it