The serif Gentium font and the sans DejaVu font is included on every Webconverger distribution since version 2.21.
Installing the default Webconverger fonts on a Debian/Ubuntu machine:
monty:~% sudo apt-get install ttf-gentium ttf-dejavu- Restart your browser
On other operating systems:
Microsoft fonts
The package msttcorefonts contains the familiar Microsoft fonts like Arial, Verdana etc. Since there are license and freedom issues shipping these proprietary fonts with Webconverger, they have been dropped.