Ubuntu has announced the release schedule of Ubuntu 10.04, Lucid Lynx. Lucid Lynx is scheduled for release on April 29, 2010, which will be the next Long Term Support release in the Ubuntu lineup. The schedule is as follows:

December 10, 2009 » Alpha 1 Release
January 14, 2010 » Alpha 2 Release
July 23, 2010 » Alpha 3 Release
February 25, 2010 » Alpha 4 Release
March 18, 2010 » Beta 1 Release
April 8, 2010 » Beta 2 Release
April 22, 2010 » Release Candidate
April 29, 2010 » Ubuntu 10.04 Lucid Lynx Final Release