So now I wonder if I can toss the paper receipts -- at least for tax purposes. The IRS says yes (more on NeatReceipts below):
Welcome to NeatReceiptsNeatReceipts, incidentally, is a wonderful business idea. They provide custom software and a portable scanner for automated scanning and processing of receipts. I don't know how it works in practice; it has at least two big drawbacks from my perspective. For one it's XP only, and I'm trying to minimize the use of XP at home. For another I don't want yet another scanner. I have a multi-function device with a document scanner, a flat bed scanner, and a Nikon negative scanner. I just can't handle the hassle of another device to fuss with.
Does the IRS accept digital receipts?
Yes. According to ruling Rev. Proc. 97-22, the IRS allows one to prepare, record, transfer, index, store, preserve, retrieve, and reproduce books and records by either electronically imaging hard copy documents to an electronic storage media, or transferring computerized books and records to an electronic storage media that allows them to be viewed or reproduced without using the original program.
Can I throw away my receipts once I have captured an acceptable image?
Yes. According to ruling Rev. Proc. 97-22, the IRS permits the destruction of the original hard copy books and records and the deletion of original computerized records after a taxpayer completes testing of the storage system.
 I have to be logged in to the account that receives the transfer and I have the firewall disabled, I am trying to figure out what ports are in use so I can reenable the firewall -- but this machine is fairly protected anyway. I can't get things working as well with the XP box, it seems to ignore my configuration settings. I don't have confidence in the software I'm using -- there's no business model to make it robust and reliable. I do have confidence in PDF as an image format so I'll probably switch to something else some day.