I thought this was an interesting way to do a cloak and dagger scan of a document and then get it back into a usable PDF format on your computer. I am not sure if it offers any advantage above and beyond owning the Professional version of Adobe Acrobat, but it’s still pretty cool.
"A new free service that allows you to take a camera phone picture (or any digital picture) and turn it into a searchable PDF file. If you have a camera phone with at least one megapixel of resolution, ScanR is great for turning things like whiteboard images and paper drawings into something more usable."