Enforce any application to appear full screen in gnome

In Gnome, you can force any application to go full screen;
Open System=>Preferences=>Keyboard shortcuts
Under "Window Management" assigne any key combinations such as "CTL+SHIFT+F" for "Toggle Fullscreen mode".
Open any application (firefox, eclipse, ....) and press "CTRL + SHIFT + F", the program will goes in full screen mode.

How to change the gnome default keyring password in Ubuntu Karmic (may apply to other versions as well)

After I initially set it, I needed to change it so that it matches my login password:

1. Open a terminal
2. type "seahorse"
3. Right-click on "Passwords: login" and click "change password"
4. Type your old password and then your new one.
5. Done!

 enjoy :)