GNOME and Bitstream recently got together to make some Free fonts for open source operating systems. They came up with the Bitstream Vera fontset. These can be downloaded and installed on your Operating System (if it be Linux/Windows/MacOS etc) and you'll have the use of some nice, high quality Free fonts.

Information about the Bitstream Vera fonts and downloads can be found with gnomes announcement: http://www.gnome.org/fonts/

The fonts can be installed on most versions of linux with a bit of twiddling, I imagine over the next few months they'll be intergrated into release (and updates) for most distributions.

The wiki now (2003-04-30) uses the Bitstream Vera fonts by default (if you have them installed)