My phone is not rooted--the screenshot apps were for rooted phones.
What does the icon look like and on what side of the notification bar is it?
The left side of the bar is notifications for apps, msg's, etc while the right side is system or ongoing processes...
Does this help?
Info from thread on DroidXForums.com...
What do the icons on my phone mean?
At the top of the screen, icons on the left notify you about new messages or events (flick the bar down for details). Icons on the right tell you about phone status.
Notification icons report the arrival of new messages, calendar events, alarms, as well as ongoing events, such as when call forwarding is on or the current call status. When you receive a notification, its icon and a brief summary appear in the status bar, and then is replaced just by its icon.
You can open the Notifications panel to view a list of all your notifications. Applications whose activities produce notifications, such as Gmail and Google Talk, have their own settings you can use to configure whether and how they send notifications.
Below is a list of notifications and status icons:

Uploading data

SD card is full

Download complete

Voicemail Message

Connected to VPN

Disconnected from VPN

New Email Message

Volume

Problem with message delivery

Problem with sign in or sync

Upcoming Event

Phone Connected via USB cable
Tip: To see today’s date, tap and hold the status indicators.