The first version of my delta compression RPM virtual repository / proxy server is ready. This is just a proof-of-concept at the moment, but it may be good enough to be useful to some. Here are the release notes: http://www.wombat.ie/software/rpmdc/releasenotes-0.1.0.html Right now you need to have the following to get it to work: * Jakarta Tomcat 4.1.31 * Sun JDK 1.4.2 It may work with other servlet containers and JavaVMs but that is the only combination I had time to test so far. If it proves useful it should be possible to remove the Tomcat dependency and perhaps compile to navative with gcj (?). I've created a delta repository to work with this software here: http://rpmdelta.wombat.ie/rpmdelta/fc3/i386/ That repository covers most of the updates for FC3/i386 and is only 250MB in size (compared to over 1GB for the RPMs). The release is available here: http://www.wombat.ie/software/rpmdc/downloads/rpmdc-0.1.0.tar.gz Joe.