The ludicrous price differences (on the SAME goods between US and Canadian retailers) that Canadian consumers still endure in the face of our dollar being on par with the US dollar ... I listened in to Charles Adler's radio program about it, and Jason and I discussed randomly with the owner of the 8th Street Book & Comic store (awesome store, BTW).
There's going to have to be some radical changes pretty soon, or consumers will choose saving $$$$ over patriotism.
Even without the over-inflated car prices issue (which is the subject of a class action lawsuit), I did these random checks myself:
Weezer Blue Album = $9.97 with free shipping on orders over $25.00 @ Amazon.com (American)
Weezer Blue Album = $10.99 with free shipping on orders over $39.00 @ Amazon.ca (Canadian)
I'd love to look up more examples right now, but I'm not in the mood to surf.