Free Online OCR: web app delivers editable text from scanned images or PDFs

Do you have PDF documents or images (e.g. JPG, PNG, TIFF) that were created using a scanner, and that you wish you could convert to editable text?

http://www.freewaregenius.com/2011/04/06/free-online-ocr-online-service-delivers-editable-text-from-your-scanned-images-or-pdfs/