Pinguy OS 12.04 LTS (based on Ubuntu 12.04) has been released today and it uses GNOME Shell by default, customized with quite a few extensions that give the latest Pinguy OS the same feel as the previous releases.
For the 11.10 release, Pinguy OS was labelled “beta” because its developer didn’t consider it was mature enough. With the new 12.04 release, there’s no more beta label and indeed, Pinguy 12.04 feels mature and stable, bringing you a huge list of customizations both for the user interface as well as under the hood (like zRam for instance).