Google is a nice addition to your ubuntu 9.04 desktop. Here is how I installed it.
Get the deb package from http://www.getdeb.net/release/3767
$ sudo dpkg -i google-gadgets_0.10.5-1~getdeb2_i386.deb
If it asks for any dependency , install them too.
Open a terminal and run
Now the google gadget panel will appear on the screen. There are lot of cool gadget available. You can install them by right clicking on the gadget panel.