Published by Chris Coyier
FitText makes font-sizes flexible. Use this plugin on your fluid or responsive layout to achieve scalable headlines that fill the width of a parent element.
Super simple, super nice effect, super practical jQuery plugin by Dave Rupert.
You need to attach an event to the window resize event, which can fire fifty zillion times in IE & WebKit as you resize a browser window, so if you wanted to slow that down you might wanna try this.