This a nice update for Font Awesome, but I am still a big advocate for using IcoMoon [1] to generate your own icon font.
I think it's the best way to generate a font with only the icons you actually need. It's a much more lean way to handle icons, rather than just getting an icon font with a huge library that you won't even use 70% of. And don't get me wrong, Font Awesome has great icons, but I would just use those inside IcoMoon to generate a font that has only the icons you need.