Debian stable, with sid packets

I found a very nice tip for having a stable version of Debian, with the newest packages.

I use stable (etch) plus a deb-src line pointing at sid (so it only fetches source packages, not binary).
When I need a newer version of a package, I build it from source:

apt-get source foopkg && cd foopkg-3.0
dpkg-buildpackage -rfakeroot -b
su -c 'dpkg -i ../foopkg_3.0.deb'

from http://www.kdedevelopers.org/node/3245#comment-7290