I recently saw the new HTML5 Search input element and wondered what the heck it does:
Chris Coyier has posted an in-depth article going into this new HTML5 input type to appease your curiosity. The HTML5 spec actually says you don't have to do much with it, but Webkit actually has a range of options.
First, it visually distinguishes the input field with an inset border, rounded corners, and typographic controls:
Chris has discovered that you actually can't override the following visual properties on a search input with CSS:
However, the following can be styled in an HTML5 search input:
Chris (via Mike Taylor) also discovered a 'results' parameter that can be used on Webkit but is not in the HTML5 spec:
which gives a drop down with the number of results requested: