Font Awesome has been integrated into PageLines for a long time, but DMS 2 includes the updated Font Awesome 4.
DMS implementation of Font Awesome is located in dms/dms/less/icons.less, which is what you’ll want to reference if you want to do some advanced styling.
Don’t forget my handy Icon Font Shortcode plugin may help you.
The results from the Font Awesome code examples are possible in DMS 2. Font Awesome 4 also includes the PageLines Leaf as an icon: