Disabling NetworkManager balloons

One of the reasons I hate Windows for is the frequent useless info balloons it shows.  Some people seem to like such balloons, including those who maintain NetworkManager applet.  Recently, we started using NetworkManager to manage the wireless network adapter, and I hated the frequent balloons that said "you are connected to so-and-so network".  Turns out that disabling those notifications is not very obvious (at least with version 0.7.0.99).  Here's what you do to get rid of those annoying balloons:

• Enter gconf-editor in command line to open GConf editor.
• Navigate to /apps/nm-appletr in the editor.
• Add a new key of Boolean type with the name disable-connected-notifications and the value True.

From next time, you won't see those annoying balloons when NetworkManager connects to a new network.