Many of you have asked about upgrading GLTT to use Freetype2.
Since the API of Freetype2 differs substantially from Freetype,
this would be difficult, if not impossible.
Henry Maddocks has undertaken writing a library called FTGL
which wraps the Freetype2 library for OpenGL font rendering.
Although FTGL is in its infancy, it is up and running on the Mac,
the Linux port is underway.
web site for more the FTGL source distribution.