This is the Fedora Online Desktop Live DVD. It has been configured to use the GNOME Online Desktop as the default desktop environment. If you want to use the standard Fedora GNOME desktop instead, you can select that using the Sessions menu at the bottom of the login screen.
Select 'Enable Online Desktop' in the top section of the sidebar. This will take you to http://online.gnome.org where you can log in or sign up.
Clicking on your name in the top section of the sidebar will bring up a menu that will let you re-visit your account page, and edit desktop and sidebar preferences. Select 'Sidebar Preferences' in this menu.
The search box under your name will allow you to launch applications and open files. It will also let you start IM conversations or visit Mugshot pages of your contacts.
Select 'Configure IM Accounts' link to enable Pidgin and get the People section of the sidebar populated. The people section includes your IM contacts and your Mugshot contacts, if you have Mugshot enabled.
You can enable Mugshot on your online.gnome.org homepage. After that, type 'Mugshot' in the search box and click on the application name to start the Mugshot Stacker application.
Mugshot is more fun when you have many contacts there, so find some people you know and add them as your contacts. Also, join some groups, such as GNOMErs.
Select the 'More' link that is available on top of some widgets to see an expanded view. Click the rest of the top section of the widget to collapse or expand it.
Join irc.gnome.org #online-desktop or e-mail online-desktop-list@gnome.org to ask for help or get involved. Visit the wiki for instructions on how to get started with Online Desktop development and other information.