Font Awesome 4.1, was released last week, adding 71 new icons, including one for WordPress, Reddit, CodePen, Drupal, Joomla, Spotify, and others.
Font Awesome was originally designed for use with Bootstrap, which helped it to become popular, but was soon widely used outside of Bootstrap-based projects.
Now that a WordPress icon is included, the font will become even more useful for developers writing plugins and themes that make use of the icons. Some WordPress users have even requested WordPress post format icons to be added to a future release. This could potentially be very useful for theme developers but may not gain enough traction.
Font Awesome also comes with its own free CDN. The BootstrapCDN for Font Awesome, hosted by MaxCDN, is free for anyone to use. What are you waiting for update to 4.1 now!