Lenny is presently Debian's testing distribution. This means that it will change and update more frequently over the next year until it's ready for release. Having said that, testing is 'generally' quiet stable but a sudden influx of updates can skew things a little.
I guess if you enjoy reconfiguring things and sorting out the occasional problem then it might be exactly what you want. However, is that the reason for the upgrade or is it more related to your additional request for DVD and multimedia support?
Looking at your sources list (and assuming your in the UK) then you'd be better off with this;
Code:
# Main repository for Stable with non-free extras
deb http://ftp.uk.debian.org/debian/ etch main contrib non-free
deb-src http://ftp.uk.debian.org/debian/ etch main contrib non-free
# Security updates for stable
deb http://security.debian.org/ etch/updates main contrib
deb-src http://security.debian.org/ etch/updates main contrib
# DVD and mulimedia codecs
deb http://www.debian-multimedia.org etch main
Firstly you don't need your reference to us.debian.org as all those extra packages are in the UK mirror as well; so I've amalgamated them together. It keeps your sources list a little cleaner and reduces traffic.
Secondly I've added the debian-multimedia repository. It's run by one of the Debian maintainers as an extra repository dealing with a lot of the patent influenced and proprietary multimedia software that can't go into the main Debian repositories. This includes things like DVD, Real and Windows codecs. I use it all the time and it's well worth it.
Having said all that, if really want to upgrade to Testing then change your sources list to;
Code:
# Main repository for Lenny (Testing) with non-free extras
deb http://ftp.uk.debian.org/debian/ lenny main contrib non-free
deb-src http://ftp.uk.debian.org/debian/ lenny main contrib non-free
# Security updates for for Lenny
deb http://security.debian.org/ lenny/updates main contrib
deb-src http://security.debian.org/ lenny/updates main contrib
# DVD and mulimedia codecs
deb http://www.debian-multimedia.org lenny main
Again you get the extra multimedia codec support. Once you've changed your sources list do the following as root;
followed by;
Code:
apt-get dist-upgrade
If you just do a normal apt-get upgrade you'll be stuck somewhere in between the two. So make sure it's a dist-upgrade.
After a lot of downloading and some package reconfiguration you'll be in testing. Keep in mind that going backwards isn't really possible and testing has the slowest of security updates out of all the Debian versions (if any at all).
Hope that helps a little and let us know if it works out. And honestly I'm not sat at work bored as hell
