You can add a Creative Commons sources.list line. We distribute software for Debian Unstable and Ubuntu intrepid.
To have your system trust our repositories, run these commands:
$ gpg --keyserver subkeys.pgp.net --recv-key 0x1B01F328 $ gpg -a --export 0x1B01F328 | sudo apt-key add - $ sudo apt-get update
deb http://mirrors.creativecommons.org/packages unstable main deb-src http://mirrors.creativecommons.org/packages unstable main
deb http://mirrors.creativecommons.org/packages intrepid main deb-src http://mirrors.creativecommons.org/packages intrepid main