here we go :
Hewlett-Packard released two beta versions of its open source webOS on Friday: one for developers that runs on the Ubuntu Linux desktop, and one for the "OpenEmbedded" development environment, intended to help developers port webOS to new devices.
The beta desktop build includes a version of the webOS System Manager that will run as an application on the Ubuntu desktop, the team wrote. System Manager's functions include rendering the webOS Card View, Launcher, Status Bar and other user interface elements. Core webOS applications such as Calendar and Contacts run within System Manager, and the new version also supports apps built with the third party Javascript framework Enyo, the team added.
BUILD WEBOS
https://github.com/openwebos/build-webos
BUILD DESKTOP
https://github.com/openwebos/build-desktop
complete news :
http://www.computerworld.com/s/article/9230860/HP_releases_two_beta_versions_of_open_source_webOS