That person (who has loaded those pics to show you the WiFi bars) has Open Notifier loaded. The W1 is usually the symbol for Words With Friends and the yellow arrow is the one for ReadItLater. The other two are just generic symbols. With Open Notifier, you can assigned whatever symbol you want to any app that has notifications. I use the tweak so I can have the mute symbol show when my phone is muted...
A slightly off topic question: What font do you have installed? I assume it's BytaFont? Me likes (and wants). So, please tell? TIA.
Marilyn