Print to bookkeeping is actually a pretty brilliant idea... I'm planning to start doing itemized taxes for the coming year, and this could be useful as a basis for capturing receipts... Combined with cloud print... snap a photo of the receipt on my phone, print to bookkeeping, sort it out later.

Might even be able to combine with GPS info in the image to log where the receipt is from, etc.

This could be a pretty decent idea for adding to online bookkeeping services... so that you can tag receipts, for tracking the taxable portion of them, etc.

Advance print queues for printing services could be another thing...