After nearly one year of development, we have finished the first release candidate for XtreemFS 1.3.
The most important new feature is the cross-site file replication with auto-failover. The new replication works with mutable files, i.e. files can be read and written.
We have created packages for Linux in our repositories on build.opensuse.org, they should become available within a few hours. For Mac OS X, we have a packaged client with installer. The sources can be downloaded at http://code.google.com/p/xtreemfs/downloads/list.