gksudo "gedit /etc/apt/sources.list"
(but i think normal repositories should include it too)
gives:
## -----------------------
## LINUX MINT REPOSITORIES
## -----------------------
## +++ Daryna (Linux Mint 4.0) +++
deb
http://www.linuxmint.com/repository/ daryna main upstream import
## deb
http://www.linuxmint.com/repository daryna community
## deb
http://www.linuxmint.com/repository daryna backport
## +++ Romeo (Linux Mint Unstable) +++
## deb
http://www.linuxmint.com/repository romeo daryna
## +++ Source Repositories +++
## deb-src
http://www.linuxmint.com/repository daryna main upstream import
## deb-src
http://www.linuxmint.com/repository daryna community
## deb-src
http://www.linuxmint.com/repository daryna backport
## deb-src
http://www.linuxmint.com/repository romeo daryna
## -------------------
## UBUNTU REPOSITORIES
## -------------------
## +++ Gutsy (Ubuntu 7.10) +++
deb
http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiverse
deb
http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiverse
deb
http://security.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiverse
## +++ Backports & Proposed (Ubuntu Unstable) +++
# deb
http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse
# deb
http://archive.ubuntu.com/ubuntu/ gutsy-proposed main restricted universe multiverse
## +++ Source Repositories +++
# deb-src
http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiverse
# deb-src
http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiverse
# deb-src
http://security.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiverse
# deb-src
http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse
## ------------------
## OTHER REPOSITORIES
## ------------------
## +++ Canonical +++
deb
http://archive.canonical.com/ubuntu/ gutsy partner
## +++ Medibuntu +++
deb
http://packages.medibuntu.org/ gutsy free non-free
deb
http://www.getautomatix.com/apt/ gutsy main
#AUTOMATIX REPOS START
deb
http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse
#AUTOMATIX REPOS END
deb
http://download.tuxfamily.org/screenlets gutsy screenlets
deb
http://download.tuxfamily.org/syzygy42 gutsy avant-window-navigator
deb-src
http://download.tuxfamily.org/syzygy42 gutsy avant-window-navigator