Victor Lombardi of Smart Experience and I begin DAKISSA, a podcast that looks at innovations in interface design. In the first episode we look back at the way Kayak.com provided rich filtering controls and results visualization. I first saw Kayak's search interface in 2005. The interface has not changed much from when it was introduced, and still remains an excellent example of the type of AJAX interaction that is so valuable to the customer's experience that you cannot imagine the site without it.