A 50mm lens is a 50mm lens no matter what camera you put it on. As you stated, the "digital" lenses produce a smaller image circle. Because of this, the lenses can be made smaller, and lighter, but they are still XXXmm lenses. The crop factor still applies because your sensor is still smaller than a 35mm film frame. I'm probably making this more confusing.

Check out this thread. Loupey has a visual example that should help clear things up for you.

Crop Factor