For SUSE enterprise customers, SUSE Linux Enterprise 11 Service Pack 3 has been released today. The Nuremberg-based company calls this the first enterprise Linux distribution integrating UEFI Secure Boot support.
The SP3 update to SUSE Linux Enterprise 11 (SLES 11) also updates its Btrfs support for handling quotas with sub-volumes and also to provide faster snapshotting, better performance, and other newer Btrfs features. While SUSE has toyed with Btrfs on their enterprise platform, it isn't yet the default SLES file-system.
Other SLES 11 SP3 changes include new hardware support (the latest Intel Xeon and AMD Opteron CPUs), updates to the KVM 1.4 and Xen 4.2 virtualization hypervisors, performance improvements, and various other enterprise-related OS features.
More details on SUSE Linux Enterprise Server 11 Service Pack 3 can be found via the press release
and SLES 11 SP3 promotional page