The Linux 2.6.22 kernel was release yesterday. Features include a WLAN driver for the OLPC laptop and an Ivtv driver for various Hauppauge WinTV-PVR models, new WLAN and FireWire stacks and several new device drivers. Over 500,000 lines of source code were changed, shifted or inserted -- more than any other version of the 2.6 series.
http://www.kernel.org/
View the 2.6.22 changelog.