The only additional repo I added was debian-multimedia it has the codecs, and pieces necessary for viewing DVD's..
Beyond that everything else I need is in the standard repos.
Code:
user@debianetch:~$cat /etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux testing _Etch_ - Official Beta i386 NETINST Binary-1 20070329-08:46]/ etch contrib main
deb http://ftp.uwsg.indiana.edu/linux/debian/ etch main non-free contrib
deb-src http://ftp.uwsg.indiana.edu/linux/debian/ etch main non-free contrib
deb http://security.debian.org/ etch/updates main contrib non-free
deb-src http://security.debian.org/ etch/updates main contrib non-free
deb http://www.debian-multimedia.org etch main
after adding the debian-multimedia repository.. update apt, install the GPG Keys for the multimedia repository, then grab your codecs, etc..
aptitude update
aptitude install debian-multimedia-keyring
aptitude install libdvdcss2 w32codecs vlc
vlc is a personal preference for a media player.. there are several good options.