What originally got me wondering about this was an ad I saw for "ShapeSnatcher", which is a plugin for Maya, I believe. It worked by using a slide with a fine calibrated grid pattern that was used to light the model when taking the picture, then the software analyzed the resultant image and generated a 3D model. I checked their site though, and found it was about $2500 (plus Maya), which is a bit out of my range. I also saw mention of another product ("realVIZ" or something like that) that used several photographs from different perspectives, on which you had to manually identify identical points on the object. And now photomodeler lite, mentioned by Kurka above. Still wondering if anyone has tried any of these, and has an opinion on whether the results are worth the trouble and/or expense...?