The Ubuntu developers are moving very quickly to bring you the absolute latest and greatest software the Open Source Community has to offer. Hardy Heron Alpha 3 is the third alpha release of Ubuntu 8.04, and with this new alpha release comes a whole host of excellent new features.
Note: This is still an alpha release. Do not install it on production machines. The final stable version will be released in April 2008.
With Alpha 3, PolicyKit integration is gaining visibility in the administrative user interfaces. PolicyKit makes it possible to run administrative applications as a normal user, and have them get a particular set of extra privileges for certain operations, which allows fine grained control over user permissions and enhances usability, as well as eliminating the security implications of running the whole application as root.