Ubuntu 8.04 LTS is the upcoming version of the Ubuntu operating system. The common name given to this release from the time of its early development was “Hardy Heron”.
Note: This is still a beta release. Do not install it on production machines. The final stable version will be released in April 2008.
If you want to know what are new features in this release check here
Upgrade from 7.10 to 8.04 LTS Beta follow this procedure
Before you start Upgrading you need to know the following points