We switched many years ago and have never looked back. Besides getting large bottles with loud branding out of our sink area, cutting dish soap with 3 parts water makes dishwashing easier, saves on soap and lightens the load on the environment.
We use a small squeezebottle in our apartment to deliver a quick jet of cleaning power to dirty dishes, while our friends use a simple ceramic bowl that they dip sponges and brushes into when cleaning. Either way works well.
Once you switch, you'll never look back.
(Re-Edited from 2004-08-03 - MGR)