An introduction to Growl, a notification application for OSX
Application Notification Settings
Change Growls default location to display notifications, and specific applications
Change Application Notifications
Change notifications for specific applications, change where notifications are displayed, if they're clickable, and what you're notified of
Change Where Notifications Are Shown
Change the style for your notifications, and their location (including which monitor)
Disable Specified Applications
Disable notifications for specified applications
Change the length of time notifications are displayed for
Play Sounds On Certain Notifications
Choose to have a sound played of specified notifications
Enable growl notifications for iChat using Chax