Linux Kernel 2.6.30

Linux 2.6.30 was released on the 9th of June, 2009.

Summary: This version adds the log-structured NILFS2 filesystem, a filesystem for object-based storage devices, a caching layer for local caching of NFS data, the RDS protocol which delivers high-performance reliable connections between the servers of a cluster, a distributed networking filesystem (POHMELFS), automatic flushing of files on renames/truncates in ext3, ext4 and btrfs, preliminary support for the 802.11w drafts, support for the Microblaze architecture, the Tomoyo security module, DRM support for the Radeon R6xx/R7xx graphic cards, asynchronous scanning of devices and partitions for faster bootup, MD support for switching between raid5/6 modes, the preadv/pwritev syscalls, several new drivers and many other small improvements.

http://kernelnewbies.org/Linux_2_6_30
It seems very good