Interview with Jakob Nielsen...
What do you think of the current implementations of AJAX (Google Maps, Writely, Google Suggest, Zimbra, etc.) on the Web today?

"They are irrelevant for the vast majority of business web sites. (And by "business web site" I also mean sites for government agencies and non-profits.)

A business site will profit much more from writing better headlines than from sticking a programming trick on its pages. Take maps: yes, it's one of the usability guidelines for store finders and locators to show a map of your location.