Luc Devroye's homepage Contains enough information about fonts and other things to sink a ship. This guy designed a bunch of free fonts, and his homepage has a lot of interesting links, information and commentary.
The Font Deuglification HOWTO (obsolete) discusses TrueType fonts under Linux. This is the clear winner of the ``TrueType'' HOWTOs. An excellent source of information.
TrueType Fonts in Debian mini-HOWTO discusses installing TrueType in Debian. A must-read for Debian users. Also worth reading if you have any distribution that doesn't have the version of xfs with TrueTypesupport.