Nikola Lazarevic recently posted some thoughts on responsive web design, along with some three dozen examples of interesting sites:

One of the hottest topics among web designers and developers is responsive web design. Responsive web design is an approach advocating a fluid grid layout with column widths that adapt to available screen space, while media queries allow us to serve up different style sheets depending on the browser window size and resolution.

Nikola Lazarevic @ webexpedition18