"Lucid Lynx" is the code name for Ubuntu 10.04, released on 29 April 2010.
The Ubuntu Developer Summit for Lucid took place from November 16th to 20th, 2009 at the Renaissance Hotel in Dallas, Texas, United States.
For for more information on the final Lucid releases:
Ubuntu 10.04 LTS release announcement April 29, 2010
Bugs in Lucid
Your comments, bug reports, patches and suggestions will help fix bugs and improve future releases. Please report bugs per the instructions on ReportingBugs.
If you want to help out with bugs, the Ubuntu Bug Squad is always looking for help.
The next release after Lucid is codenamed Maverick Meerkat; the Releases page contains a list of all Ubuntu releases.
If you would like to help shape Ubuntu, please take a look at the Ubuntu Get Involved page.
To have future Ubuntu development announcements emailed to you, please go to the ubuntu-devel-announce page and subscribe with your email address.
To have future Ubuntu package updates emailed to you, please go to the lucid-changes page and subscribe with your email address.
More Kubuntu information can also be found at Kubuntuguide.