If you want to run only Stable debian (sarge) then you should get away with only a couple of repositories - you have way too many now.
# These you should include in every "stable" debian sources.list
# This is the place where security updates are downloaded from
deb
http://security.debian.org/ stable/updates main
# This is the main Debian stable repository, you should include it or you
# can't install anything
deb
http://http.us.debian.org/debian/ stable main contrib non-free
# This is an unofficial repository for multimedia packages, e.g. mplayer
deb
ftp://ftp.nerim.net/debian-marillat/ sarge main