I Just bought a Lexmark Z65N (The ethernet version) and it comes with OS X drivers for 10.x.x The printer works great from both my G4 and the Ibook (via Airport) as I have it sitting on my home LAN.
I can get to it from both Windows & the Macs, setup was a breeze.
Itīs fast, quiet and pretty good output too. Hope this helps!
Cheers, Willim