Released yesterday, on "Talk Like A Pirate Day", was the Linux 2.6.18 kernel. A few of the changes include the new zd1211 WiFi driver, a horde of fixes for the Intel-based Macintosh machines, and Hotplug and many other fixes for the SATA driver. The complete change-log can be read
here. As always, the latest kernel can be grabbed over at
Kernel.org.