Here is my setup....

iMac (rev a ) upgraded to Harmoni 500 G3
iBook (dual USB)
iMac 350

I have a cable modem hooked into a router (Linksys 4 port). I have the older iMac connected to one port and an orig Airport Base Station on the other one.

I cannot connect to the printer on the older iMac. What is weird is that I can mount the drives on the older iMac from the newer iMac and iBook. I just cannot print to the printer. I can print to the newer iMac from the iBook but not from the older iMac. What gives?