The printer would not be found, or if found, would not print, or would print but not eject the page (with MS Word). I couldn't check ink levels or other configuration choices supposedly available. I won't even go into the things that I couldn't do. I spent probably a hundred hours trying to solve this -- calling Apple, calling HP (who always kicked me into the Windows group no matter what I told the person that routed the calls). I reinstalled the HP printer software probably 20 times as this would usually fix the problem for a week or so. Apple techs told me (more than one) that wireless would not work with this unit -- period. HP said it should but had nothing to offer than what I was already doing. Or let's say all their advice came to naught. I was using the latest OS (10.3.3), the latest HP software, ran permissions repair and Disk Warrior a zillion times, fsck -- everything I could think of.
The final straw came when I hooked my wife's G4 iBook, running 10.3 to the unit by USB and no matter what I did it would not recognize the printer. It would with my PowerBook, but not her iBook. Go figure. At this point I was ready to junk the HP and start with something else, even though I had bought an extended contract for it.
About this time, I saw here in the hints about using GIMP software to run printers so I downloaded gimp-print-4.2.6-0.ppc and installed it on both computers. Added to the printer list in the Printer Setup, tried printing with both computers -- and I could, but the output was not good. Dark, not crisp.
Really gave up, made my HP driver software default again and on my wife's iBook, I removed the GIMP software. And, mirabile dictu, everything now works for both our laptops -- printing, scanning, wireless, etc. Has worked reliably now for a month. I can't believe it, but want to think it is solved. I assume that the GIMP software installed something missing in the OS X package, as I am now using the HP driver like I did before. Must have been something installed behind the scenes. Beyond me, but I want to share this story in case anyone else is struggling with one of these multi-function printers and to offer a possible solution to them.

