Well apparently Flat web design is another trend I am way behind on. What is Flat design you ask? I found an explanation here. Briefly, it is a simplistic minimalistic style that features clean two-dimensional/flat illustrations. It is a shift away from skeuomorphism.
Using fonts as icons is part of this movement. Given the flexibility one has to style fonts, it fits well with flat and responsive design. So digging around a bit I found the following.
- CSS Tricks: Why Icon Fonts are Awesome
- Font Awesome - A free open source icon font set that can be used with or without Twitter Bootstrap
- CSS Tricks: Big Font List - A list of many fonts you can you in your sites.
That's what I have found out so far. More to come on this topic I'm sure.