To be honest, I don't really understand drum scanning. But I'm curious as to why the technology hasn't come down in price or become the a consumer technology the way flatbeds have. Are the machines that make drum scanning possible so complicated that only professional labs are able to afford/use them? Seems like everything in photography has come down in price, except perhaps MF digital backs, but drum scanning technology feels like it's stuck in time with nothing new over the horizon. From the few used drum scanners I see pop up every now and then, it requires the use of a Mac G4 with SCSI, and the scanner is still quite expensive. Perhaps it's my ignorance on the subject, but it is rather difficult to find new information (from my searches).