[ILUG-BOM] gnome clock at top right corner

I work with on Ubuntu 10.04 with Gnome as Desktop Environment. I have all the toolbars on autohide mode as it gives me full space on the screen to work. This change , though, is more comfortable for me but is also causing some inconvenience. I often lose track of time spent. So, I want a way by which I could keep a widget or app like thing at top right corner of my screen (taking minimum space,hence time in DIGITAL format), which can show time. OR if I can integrate a digital clock on righmost side of the active window.

Any idea on how this can be achieved? I am looking for simple linux hacks or some config changes to do so. Otherwise will have to do so in java , Qt etc.

Please pour in your ideas...