“The release schedule for Ubuntu 11.04 (Natty Narwhal) operating
system has been modified last week on the Ubuntu wiki. The
distribution will still be released at the end of April 2011. The
first Alpha version was supposed to be available for testing last
Thursday, November 4th.“For Ubuntu 11.04 (Natty Narwhal), the Ubuntu developers decided
to change the release schedule again, to 3 Alpha versions instead
of 5, a single Beta release, and a Release Candidate. Here is the
new release schedule for Ubuntu 11.04:”