This is a really neat service for all of you who run comprehensive websites and like to introduce your visitors to it.
Amberjack, created by Arash Yalpani, is an Open Source javascript library which enables webmasters to creat cool site tours. Watch the demo on Amberjacks site.

You can get this service in two ways: either you download the library and integrate it into your own site or you use the tour wizzard. Best of all is, you don´t rely on the available tour template skins but can create your own easily.

Drupal users are fortunate as Stefano wrote an amberjack Drupal 5.x module.

Germans can watch a screencast on Amberjack published by pixelgraphix.de.

If you regard this service a gimmick, you probably never trained people on computers. The amount of people with computer knowledge in real world is very low. Remember your parents, aunts or even colleagues. No question, navigating a website should be an intuitive process. Many people though have never developed such an intuition. If your targeted audience are not computer freaks but f. e. people who seek information on f. e. health issues, consider Amberjack as a great tool introducing your website and services.