// Inspired by an elegant piece of CSS code by +Lea Verou, creating the WiFi code (see it here http://bit.ly/wificss), I searched for other examples of this and found this little gem: A demo of 84 icons created with just CSS by +Nicolas Gallagher.
Nicolas calls it's a "technical exercise" but given that this was done back in 2010 and support for the methods used is much wider now, the code should be working in all modern browsers.
You can see it in action and dig into the code here http://bit.ly/css-gui-icons
Epharisto!