Imaging the following: You're on a trip with your iBook, PowerBook or MacBook Pro and you want to check E-Mails or do something in the internet.
So you're searching for a wireless access point. To do this the "normal" way you have to check the Apple airport-menu continuously to see if a network is in your range.
This normal way is very bad because of two facts:
1. You will miss many networks, because you don't want to open and close the airport-menu all the time
2. In the airport-menu you don't see if the network is encrypted or open - you have to try to connect to verify this
displays you a small aqua-bubble at the top of your screen which indicates whether you're in range of a wireless network or not.
The app also tells you if the wireless networks in your range are encrypted or open, so you won't miss the next open wireless network any more.
New in the completely rewritten version 2: More information about the network (bssid, channel)
Known limitation in version 2: Currently a click on a network doesn't connects you with this network. I'm working on this issue.