When I first switched to the iPad for scanning, I proposed snapping photos and sending those photos as attachments to our remote cataloger.
But the feedback I received is that multiple photo attachments are harder to work with then a single PDF file.
Based on this feedback, I installed an app called cumScanner, which helps with converting image files into PDF files and is even capable of OCRing your files if needed.
But the simple capability of converting image files to PDFs is sufficient for us.