The first release-candidate of the 2.6.22 Linux kernel has been released into the wild. 2.6.22 at first glance seems to be an ‘everything but the kitchen sink release’, as according to Linus:

The diffstat and shortlogs are way too big to fit under the kernel mailing list limits, and the changes are all over the place. Almost seven thousand files changed, and that’s not double-counting the files that got moved around.

Later in the mailing-list mail he discusses some high level indicators of what has changed (see above for the link). For those curious, here is, I believe, the full change-log - and it is certainly a doozie.