Red Hat Enterprise Linux 5.4 is out. They have folded a lot of changes
into this release, including x86_64 KVM support, FUSE, the XFS filesystem,
a number of SystemTap enhancements, and a lot of driver updates; see the
release notes for details.
For CentOS users: the word is that CentOS
5.4 will be available "in 2-4 weeks or so, when