I have read a little bit about this in the past, but it never ceases to amaze me how truly global our world is.
Something that many internet users definitely do not understand, the long arm of the law is VEEEERRRRRRY long these days:
US Jurisdiction over Canadian Sites
Richard P.W. Stobbe from Brownlee's IPblog
Makes me think of this case too:
Dow Jones & Co. Inc. v. Gutnick