i'm not sure if this is technically feasible or even possible, but what i miss in PrinterPrefs is an option to spool the data before it is being sent to the device/printer.
I know of PrintManager from Stephan but it does funny things when using lpr.device.
(I have a HP Laserjet 5L with a Centronics to WLAN adapter [yes, they exist

The reason i'm asking is that it would make a great addition.
e.g. when the printer acts up while printing and one has to send the whole work again.
It would make life much easier to send the backuped data created from the spooler in the spool directory again instead of going through the whole process of opening AmiPDF, Multiview, Notepad, whatever...load the file...print the file...yeah...i'm lazy

If possible add an extra TAB to PrinterPrefs [SPOOL] where one can turn it ON/OFF and set a path to a spool dir.
Then capture anything that is being sent to the device/printer and save it to that path before relaying it to the printer/device.
After everything has been sent delete the data from the spooler (maybe wait for a OK from the printer/device?)
The other thing i'd like to see is Notification support for the Printer
Something like..."Name of the Document" sent to "Printer Name"...
or Printing "Name of Document" on "Printer Name"...
Thanks a lot for this great OS
