Web 2.0 Can Be Dangerous

As illustrated in a sidebar, an AJAX feature can work well on a website. And our testing did find one usable AJAX shopping cart. As always, the real question is not technology, but usability. If you use technology right, it can help sales. Still, the risk is typically too high with new technology because best practices haven't jelled yet. You can't just emulate designs you see around the Web — they're likely to be bad because they were hacked together by geeks drunk on the newest and coolest tech. And, sadly, "newest and coolest" usually translates into "untried and unusable" — and thus money-losing.

http://www.useit.com/alertbox/web-2.html

[Jakob forgot to mention "Ajax Sucks".]