Please support Black Tie, the new icon font from Font Awesome!
             

fa-stumbleupon · Unicode: f1a4 · Created: v4.1 · Categories: Brand Icons

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-stumbleupon
<i class="fa fa-stumbleupon"></i> fa-stumbleupon

Looking for more? Check out the examples.