Would love to see the search box placed at the top-right of the site. Kind of a universal standard these days (and would mean no scrolling required to search).

The HTML5 `type=search` attribute would be cool as well :)

Edit: Additionally, use of `placeholder=Search` and the ditching of the label shouldn’t be terribly controversial here. Given the audience, I have to imagine most users will see the placeholder text, no polyfill required.