Mi sources.list

# Oficiales	
deb http://ftp.ccc.uba.ar/pub/linux/debian/debian/ wheezy main contrib non-free
deb-src http://ftp.ccc.uba.ar/pub/linux/debian/debian/ wheezy main contrib non-free 

# Seguridad
deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free

# Multimedia
deb http://deb-multimedia.org/ wheezy main non-free
deb-src http://deb-multimedia.org/ wheezy main non-free

# Backports
deb http://ftp.debian.org/debian/ wheezy-backports main contrib non-free
deb-src http://ftp.debian.org/debian/ wheezy-backports main contrib non-free

# Mozilla
deb http://mozilla.debian.net/ wheezy-backports iceweasel-release
deb-src http://mozilla.debian.net/ wheezy-backports iceweasel-release

# VirtualBox
deb http://download.virtualbox.org/virtualbox/debian wheezy contrib