The debian.tryphon.org repository provides various Debian packages.
You need to add to your /etc/apt/sources.list file one of these lines (according to your debian release) :
For stable :
deb http://debian.tryphon.org stable main contrib
For testing :
deb http://debian.tryphon.org testing main contrib
For unstable :
deb http://debian.tryphon.org unstable main contrib deb-src http://debian.tryphon.org unstable main contrib
See the debian packages category of the Tryphon blog.
Debian files of these packages are available in the [http://svn.tryphon.org/debian/ svn.tryphon.org] Subversion repository.