Hi to Fermi Lab from a Theoretical Physicist. Scientific Linux 5.1 is Great! This is my Corporate Server's software configuration: DELL PowerEdge 400SC Scientific Linux 5.1 (RedHat Linux Enterprise 5.1) with Secure Linux IBM Lotus Domino Messaging Express Server v8.0.1 HylaFax Server v5.2.5; MySQL Server 5.0.45 Amanda Tape Backup Server v2.5.0 Sun xVM VirtualBox v1.6.0