Notes on glibc packaging
Debian packaging for glibc is kept in SVN:
http://svn.debian.org/viewsvn/pkg-glibc/glibc-package/trunk/
http://svn.debian.org/wsvn/pkg-glibc/ (slower than the viewsvn view)
A lot of packages are maintained in http://svn.debian.org, but unfortunately they are not linked from http://packages.debian.org.