While working on rootcandy admin theme, I came to a nice idea.
I wanted to show a block with help on the right side, which I did. Then, I was figuring out if it could do more than just showing help for particular section and the idea of 'Learn as you go' was born.
Basically it will guide drupal users through setting up drupal for their needs, helping them to explain things, etc... It's not that easy to use drupal for new people and also finding stuff on drupal forums or handbooks is sometimes discouraging.