This is the last test version of Ubuntu Feisty Fawn, which is going to be released in month. Here is the list with the newupdated stuff:
VPN - VPN can now be easily used with the use of Network Manager and VPN plugins.
Desktop Effects - Graphical Desktop Effects will be made extremely accessible, with one click activation in the system menu.
Xorg 7.2 - weee :) Version 7.2 comes with significant stability and correctness fixes, including improved autoconfiguration heuristics, enhanced support for GL-based compositing managers such as Compiz and Beryl, and improved support for PCI systems with multiple domains. Some of these features are not implemented in Herd 5 but will be available in the final version.
Artwork - here is the new Human theme and the new wallpaper:
Download Herd 5: