My ubuntu's sources.list

# /etc/apt/sources.list and sum of files in /etc/apt/sources.list.d

# common karmic repos at the nearest mirror
deb http://ftp.mgts.by/ubuntu/ karmic main restricted universe multiverse
deb http://ftp.mgts.by/ubuntu/ karmic-backports main restricted universe multiverse
deb http://ftp.mgts.by/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://ftp.mgts.by/ubuntu/ karmic-security main restricted universe multiverse
deb http://ftp.mgts.by/ubuntu/ karmic-updates main restricted universe multiverse

# adobe-flashplayer and symphony (lotus symphomy)
deb http://archive.canonical.com/ karmic partner

# google-chrome-unstable and picasa
deb http://dl.google.com/linux/deb/ stable main non-free
deb http://dl.google.com/linux/deb/ testing main non-free

# googleearth and skype (currently install from this repo is not working for me)
deb http://packages.medibuntu.org/ karmic free non-free

# wine (currently the latest package is called wine1.2)
deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu karmic main

# opera
deb http://deb.opera.com/opera/ stable non-free


# for public keys search info for each repository