I just switched my Debian repository software and location. Now reprepro is used, so I can easily provide the Release file gpg signed. Add the following line to your /etc/apt/sources.list:
deb http://pkg.ring0.de/debian unstable main
and add the repository’s key to apt:
sre@mars ~ % curl "http://pkg.ring0.de/debian/key.gpg" | sudo apt-key add -
last but not least run apt-get/aptitude update. I’m currently migrating the packages from the old repository to the new one. New and updated packages will follow later.