Fixed headers and menus are everywhere on mobile sites. I hate them. On iOS for example, they really get in the way if you're viewing a page in a WebView for some application. This isn't a big deal on Android because the browser takes control.
Either way, fixed headers are really annoying, especially when paired with fixed footers for advertisments.
Having browsed wired.com on iOS, I noticed that their menu/header disappears out of the way when you're reading an article. Scrolling up slightly conveniently activates the header menu immediately.
This is a great pattern for mobile sites. It maximises the available space for content yet makes navigation a doddle.
I couldn't find any mention of this pattern elsewhere, so leaped ahead and built the code to achieve this.
Usage:
$('#top').scrollUpMenu();
This example assumes that the header is contained in a #top selector.
gfdsgfdsgfds. fdsfds.