is listed as a 281.16MB download that requires OS X 10.6.1 or later. (Note that update sizes can vary, particularly if you download the file via Software Update.) As always, Apple posted a for the driver update.
Updated Canon printer drivers available for Snow Leopard
25.03.2010
If you've got a printer from Canon and want to make sure it's fully compatible with Mac OS X 10.6, relief is just a download away. Apple on Wednesday posted updated printer drivers that include the latest Canon printing and scanning software for Snow Leopard.