Looks really nice, one nitpick: You use the placeholder-as-label anti-pattern (src: http://www.w3.org/TR/html5/forms.html#the-placeholder-attrib...) in the search field of the navbar. That almost put me off before I'd even seen the nice floating label pattern under the fold.
There are some "floating label" versions of the components that alleviate that problem, and may come handy at places where the available space is really limited, such as mobile applications.