{placekitten} – a great tool for web designers (thx @golan)

placekitten

A quick and simple service for getting pictures of kittens for use as placeholders in your designs or code. Just put your image size (width & height) after our URL and you’ll get a placeholder.

Like this: http://placekitten.com/200/300
or: http://placekitten.com/g/200/300

via placekitten.com