I recently read an article on Fast Company Design blog about a new site called FontReach that shows the most used fonts on the web. Fontreach was created by Jason Chen and Jesse Chase of Digital Ocean after they started looking for a new typeface for their website. They thought the font they chose was overused, but they needed data. No tool like FontReach existed, so they created it.
One of the most exciting developments on the web of the last several years is web fonts. No longer are you restricted to the same 13 or so webfonts distributed with both Microsoft Windows and Apple’s Mac OS X. A whole new world of web typography has opened up!