Ubuntu Hardy Heron Alpha 3Introduction
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.
In General
These features are showcased for your attention. Please test them and report any bugs you find. If you want to see what the developers have cooking for the next alpha release take a look through the hardy blueprint page
https://blueprints.lau...t/ubuntu/hardy Upgrading from Ubuntu 7.10
To upgrade from Ubuntu 7.10, run "update-manager -d" using the update-manager package from Gutsy.
Xorg 7.3
The latest Xorg is available in Hardy, Xorg 7.3, with an emphasis on better autoconfiguration with a minimal configuration file.
Linux kernel 2.6.24
Alpha 3 includes the 2.6.24-3.5 (2.6.24-rc6-based) kernel. This brings in significant enhancements and fixes that have been merged in the last few months into the mainline kernel. Among these is the introduction of dynticks support for amd64, bringing the same power savings already available on 32-bit systems to 64-bit laptops and desktops.
PulseAudio
Alpha 3 includes PulseAudio enabled by default. Some non-GNOME applications still need to be changed to output to pulse/esd by default and the volume control tools are still not integrated.
https://blueprints.lau...p-audio-jumble PolicyKit
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.
For details of PolicyKit integration in Hardy, refer to the policykit-integration blueprint.
Firefox 3 Beta 2
The latest Firefox 3 beta comes with Alpha 3, bringing much better system integration including theming that mirrors the system such as icons and colours as well as having GTK2 form buttons and open dialog.
http://cdimage.ubuntu...hardy/alpha-3/ 
Ubuntu 7.04 Feisty Fawn