As suggested by Cody Mays:
Linus has, at long last, released the 2.6.11 kernel. Only a small set of fixes has gone in since the last release candidate. Changes since 2.6.10 include InfiniBand support, four-level page tables, a rework of the direct rendering code, in-inode extended attributes for ext3 (gives better Samba performance), a new pipe implementation, a bunch of latency reduction work (though some latency issues remain), the Big Kernel Semaphore patch, and lots more. See the long-format changelog for the details.

More info @ LWN