Eos Body
"I can use my Nikon Nikkor AF 28-80mm lens for my Nikon N65 on a Canon EOS Digital Rebel XTi body?

Not without consequences. Unlike Canon Nikon, a wide range of Nikon to Canon mount transformers, which means that technically Nikkors can be used in Canons. However, there are many limitations. See what Ken Rockwell had to say about the one below (there is more than one selling brand of them.) Consider your warning: You may destroy the lens or the camera to do this. As Ace says, leave a mark on the lens of the camera brand.