I often take photos of textual signs for use later. Take it to the next level: OCR text from the built-in cameras. A friend suggested OCR from live video was even possible (on an iPhone!) My vision was being able to enter text by scribbling something on a napkin, and OCR'ing the text in.<p>Another cool method is Dan Bricklin's Note Taker (<a href="http://news.ycombinator.com/item?id=997264" rel="nofollow">http://news.ycombinator.com/item?id=997264</a>) Just need to add OCR.<p>Now, my experiments with OCR algorithms didn't work too well. Apparently the training data is the most important component.<p>Handwriting recognition is also possible, but still images lack the very useful stroke info.