The Google Wave Notifier installs itself into your system tray.
After logging on, the Google Wave Notifier will automatically inform you of new Waves or replies to existing Waves. When a new Wave appears, a popup will be displayed and the system tray icon will get an overlay icon to indicate you have an unread Wave.
Clicking on this popup will automatically open the new Wave already displayed.
When a friend comes online, a popup will be shown with the users avatar.
When there are unread Waves, the system tray icon will get an overlay icon to tell you this. Clicking on this icon will give you easy access to your last five unread Waves.
When the Google Wave Notifier starts, it queries you for your Google Wave credentials.