Drupal module idea: creating feedback screenshot

If you use Google+ you may have noticed the excellent feedback feature that they offer. You can click on a button and highlight any part of the site. The site will then create a screenshot where you can add a description and send back as feedback. This could be a great usability improvement for bug tracking and providing feedback in any site. Luckily, some clever developer managed to reverse engineer this functionality. It is a javascript library (available at GitHub) which uses the browser and the canvas element to create a screenshot: html2canvas. Drupal module anyone?