Canon is so damn stubborn when it comes to printing CD/DVDs in the US

[Zoidberg]

I modified my Canon iP4000 to print CDs. Excellent results. You could also buy a non-US Canon off of eBay, but I already had the iP4000 and was willing to tinker with it to see if I could get it to work. I don't print enough discs to sweat replacing it (or I'd get a dedicated disc printer, like that new one from Dymo).

And what MacMagus said; that sounds about right.