This is a missing functionality that was present back in system-config-printer-kde, as well as is present in system-config-printer (rh/fedora) and gnome's new control center module.
Back in system-config-printer-kde it was possible to use a 'find' button in the IPP section that would bring in a list of available printers after typing in just the server's hostname. No need to choose drivers etc. as all would go through the remote CUPS. In fact, I am unable to add a printer even if I add the ipp:// address straight to it.
I can see and manage printers already configured elsewhere using this method.
Steps to Reproduce:
1. Hit 'Add printer'
2. Go to IPP section or look anywhere else
No possibilities to search for printers in some server's queue
Git commit 06cdd75e0d89160108978a17f757c4de806cfec2 by Daniel Nicoletti.
Committed on 14/01/2013 at 23:10.
Pushed by dantti into branch 'KDE/4.10'.
Fixed regression due to the lack of browsing queues that system-config-printer had
M +1 -0 add-printer/CMakeLists.txt
M +108 -15 add-printer/ChooseUri.cpp
M +22 -0 add-printer/ChooseUri.h
M +23 -16 add-printer/DevicesModel.cpp
M +9 -8 add-printer/DevicesModel.h
M +37 -2 add-printer/PageChoosePPD.cpp
M +5 -2 add-printer/PageChoosePPD.h
M +14 -0 add-printer/PageDestinations.cpp
M +7 -0 add-printer/PageDestinations.h
M +7 -1 libkcups/KCupsConnection.cpp
M +27 -3 libkcups/KCupsRequest.cpp
M +9 -1 libkcups/KCupsRequest.h