Can photography or computer imaging be used for skin cancer screening?

Not necessary: You could send a photo to your md if you can't come into the office for an evaluation, but for now a face to face examination of your skin is better than any other technique currently available.

Yes: I frequently use this in my own clinic. There are some commercially available packages for this.

Yes: There are several on-line services that will give you and estimate as to whether a picture of your skin lesion is malignant.