The latest iteration of the Linux kernel has been released, bringing the lastest current (stable) release version to 2.6.21. It's been two and a half months in the making since the original 2.6.20 release, and several key improvements have been added that will make it more attractive to the enterprise. Particularly, many improvements to virtualization have been made, such as VMI. Many other fixes and additional hardware support has been introduced. Many network improvements has been added, such as IPv4 IPv6 IPSEC tunneling and many improvements to security and encryption. You can get all the details yourself. For anyone using a package distro, you can probably expect to see an updated kernel available soon.