I have a Canon printer that runs on my 32 bit desktop Ive not yet got it running on my new 64 bit laptop
[Note: Canon supplies 32 and 64 bit rpms but only 32 bit debs]
It is interesting. I just, a week or two ago, upgraded my system from 32 to 64 bits in my office studio. We have a network Canon printer/copier for the office (Big bugger as we do a lot of printing of handouts, booklets, etc.) that before I did this I spent hours trying to get working on Linux. Once I upgraded form Bodhi 1.* 32-Bit to Bodhi 2.2 64-Bit, and installed the printer services and configuration tools, I got at least basic black and white printing automatically. I haven't looked into seeing if I can get color working much, but honestly right now I will take what I have as I don't do much graphic work on that machine, it is my audio machine first and foremost.
Just interesting ancedote about Canon support, I don't think these drivers had anything to do with Canon however and much more to do with the Ghostscript/Postscript community, but I could be very wrong as I don't keep up with Linux printing.