I accidentally bought another Durst 4x5 enlarger yesterday, and there was still a strip of 35mm film in the negative holder (hopelessly opaque Kodak T-Max) - I could still see the negative image though, and in a moment of mental clarity, I used the little video camera in my ipod nano (in "x-ray" mode, which really just inverts the image) to see what the images were...

It actually works quite well for that - might be a quick way to get a sense of a negative before I make contact sheets...

Marc