As the growth and evolution of Ubuntu marches on three more releases of Ubuntu are due to reach ‘end of life’ for support and updates on May 9th. If you are running one of these editions, then it would be prudent to start making plans to update now.
The three releases are 8.04 LTS Server Edition (Hardy Heron), 10.04 LTS Desktop Edition (Lucid Lynx), and 11.10 Desktop Edition (Oneiric Ocelot).
Support for the Server Edition of 10.04 LTS (Lucid Lynx) will continue for another two years though.
End of life for three Ubuntu editions on 9 May [The H Open]