Upgraded to OS X Yosemite. First casualty = my Samsung ML 1740 printer.
Mavericks had not been kind to my printer, either. I had previously gotten it to work with tech magic I've long forgotten - something about GhostScript and CUPS. This time, I found a solution called SpliX.
SpliX installs CUPS drivers for Samsung printers.
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Update 2015-06-12:
This only worked for a while. It would sporadically fail. I finally gave up and purchased a new Brother printer.