Canon Drivers, etc.
After upgrading to Snow Leopard neither of my printers worked even with the included drivers. The Canon i960 driver did not work, however after much trial and error I found that the i860 Gutenprint version worked just fine. I also have an old Epson Color Stylus Pro that was not listed. Using the Epson Color Stylus Series driver brought that printer back to life.
Hope this helps someone.
Sam