Heh, do a search.. it's been covered so many times
Long story short,
IF your content provider allows it, and you're a canadian citizen, hosted in Canada, then you don't really have to worry about 2257 at all..
But some sponsors ARE revoking content.. (EG: Lightspeed)..
In those cases, you have to take your non-compliant lightspeed galleries down, but ONLY because lightspeed wants you to...
otherwise, don't worry!
(unless you use US hosting
)