You like the idea of saving bandwidth and want to try Deltup? Most likely you want to use the Dynamic Deltup Server. Here's how:

If you are running Gentoo, try reading the Gentoo WIKI

Everyone else should see this page

Click here to download Deltup/Bdelta

The latest, bleeding edge versions of Deltup and BDelta can be accessed via anonymous SVN at svn://deltup.org/deltup and svn://deltup.org/bdelta, respectively.