Robin Good: WalkMe.com is a new app which allows web site and app publishers to easily create step-by-step, interactive on-screen instructions that help users to complete specific tasks or lern how to use a new software tool.
Walkme works both as a browser add-on as well as a mobile app for your iOS device.
How it works: http://www.walkme.com/technology/
Download editor for Firefox browser: http://www.walkme.com/thank-you/
More info: http://www.walkme.com/