Whats the green bird? Hearing it for the first time
Click the Paw icon on the top menu bar and click "open Growl Preferences". Or go to System Preferences and click on Growl.
Then you will see a screen like this.
Make sure "Hide all notificiations" is
unchecked.
In the next tab which says "Applications" , you can choose which applications you want to receive notifications from. If you don't want notifications from any application, simply uncheck it.
In the next tab which says "Display Options" you can customize how you want to notifications to appear - the look, the time for which it should display, etc.
There is a preview button so adjust and customize it to whichever one you find good to look at.
The "Network" tab is for forwarding notifications to another computer and I don't need it. Never used it so can't help you out on that.
All set and done. Now sit and back and get notifications from programs running in the background without them intruding your work.
I was so satisfied with v1.2 that I purchased v1.3 from the AppStore for $1.99
But, v1.3 had all sorts of problems and didn't work with Opera which I use extensively. So I uninstalled it and reinstalled v1.2
So you see, its really easy to setup Growl