JotNot Scanner Pro
This iPhone app from MobiTech 3000 ($1.99) turns your phone's camera into a scanner. "So what?" you ask. "Why not just snap a picture with my phone?"
Here's the cool part: It lets you do perspective correction on the scanned image. Take a photo of a page, match the four corner markers on screen with the four corners of your document, and JotNot straightens out the image accordingly.
You can also "batch scan" multiple pages and send the results to Dropbox, Evernote or Google Docs with OCR (among others) or email them. For $0.99, you can even fax from within the app.