A good friend of mine just drove down to Roanoke Illinois (south of Chicago, not sure about spelling?) and picked up a '07 Dodge Cummins Dually. Saved a bundle, he said the dealer loves selling to Canadians. He's gonna get his wife a new Nitro, and the dealer will set up delivery (to your driveway) and customs paperwork for an exra $1500 on top of sticker price.
Not sure about the warranty issues, but saving SEVERAL thousand dollars on a new vehicle will surely offset some warranty repair issues if you have to pay for them.
Canadian auto dealers better start sharpening their pencils or they won't sell anything. On another note, buy your stuff from Zellers, they have already lowered their prices to reflect our healthy dollar.