Linux 2.6.31 kernel released on 9 September, 2009
Among all the changes, a few changes deserve to be noticed here :
USB 3 support
Thanks to Intel, Linux now support USB 3 and xHCI. No xHCI hardware hit the mass market yet. Linux is still a step ahead !
CUSE
The awaited extension of the famous FUSE. With this new "virtual device" File system, we will be able to link application in different layers, a good example case i read on the net would be to "proxying" OSS audio from OSS apps through the ALSA userspace layer.
ATI kernel mode
For those having problem with your old ATI GPU, this new release should fix quite a lot of freeze in X.
Better memomy management under pressure.
Benchmark showed a drop of 50% of memory major Fault when using a graphical desktop !
http://kernel.org/