Ubuntu 8.04 codenamed Hardy Heron
The 8 series of Ubuntu, Ubuntu 8.04 is scheduled for release in the Month of April 2008. As usual, it has a animal-istic code name, Hardy Heron (A heron is a kind of a bird) this time. To be precise, the Beta version releases on March 27, 2008 and the Final Version releases on 24th april, 2008. It is supposed to be released with an LTS tag that is, Ubuntu 8.04 will have Long Term Support. This includes 3 yrs of Official security and update support for desktop versions and 5 years for server versions respectively.
More About the release announcement can be found here