wheel - 2:35 pm on Apr 30, 2008 (gmt 0)

How often? Probably depends on your market. But then again, maybe not. Once you've got a clean, fast loading easy to use design I'm not sure why one would change it.

Some of the online electronics stores I use have designs that have been around for many years. And it still works fine. If they 'updated' the design that'd be bad for us customers.

I haven't updated the design on some of my sites for many, many years. They're clean, simple layouts with a bit of CSS. Almost not 'designs' at all. They rank just fine and I still occassionally get compliments from visitors.