Ubuntu 10.04 LTS Released
Ubuntu 10.04 LTS (Long-Term Support) Desktop Edition was delayed by last minute GRUB bug, but that was not enough to hold it down, its out and ready for your desktop. Also released is the Server Edition that can be used on physical servers, on Ubuntu Enterprise Cloud (UEC), and on Amazon’s EC2 public cloud.
The other members of the Ubuntu family Kubuntu, Xubuntu, Edubuntu, UbuntuStudio, and Mythbuntu are also available for download
Kubuntu http://kubuntu.org/news/10.04-lts-release
Xubuntu http://xubuntu.org/news/10.04-release
Edubuntu http://edubuntu.org/news/10.04-release
Mythbuntu http://mythbuntu.org/10.04/release
Ubuntu Studio https://wiki.ubuntu.com/UbuntuStudio/10.04release_notes
Ubuntu is available in 29 languages. List of supported languages and detailed translation statistics for these languages, see Ubuntu 10.04 LTS Languages.
Ubuntu 10.04 LTS release notes, its always good to have a glance (for new features, issues and more), are available. Update; Just a point of correction; Ubuntu 10.04 features (by Canonical)
What else: Grab it while its hot, and tell your friends to do the same.