For what it’s worth, imood.com (think of it as empathic instant messaging) has a funky command line user interface which allows you to enter shortcuts in a text box at the upper right hand side of the page. It’s an interesting idea, but I don’t know if it’d work well in practice. First, people would need to settle on a common set of a navigation commands across sites. Second, most people use the location bar in their browser as the command line shortcut to get around a site.
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