I recently purchased a Canon Pixma MP560. I followed the forum link suggested by wojox to question #89520:
https://answers.launchpad.net/ubuntu/+question/89520 from there I downloaded the printer driver and scangear packages. I forced the printer driver installation per jmcvey's instructions and now it works great. I assumed I could do the same with the scanning software by simply substituting file names in the sudo command and it seems to have worked. However, when I follow the Scan prompts on the printer LCD, it always reverts back to the "put document on platen" screen with no scan performed. Jmcvey says in the forum he/she is going to try the scangear later (back in 2009). Sir or Madam, I implore you to share your results. As always, any help from anyone, even moral support, is greatly appreciated.
Richard