I found this handy chart on another forum (Icon chart) ....thought it might be useful to some.
| Icon | What it means |
 | New email message |
 | New SMS or MMS |
 | Problem with SMS or MMS delivery |
 | New instant message |
 | New voicemail |
 | Upcoming event |
 | Alarm is set |
 | Song is playing |
 | Data is syncing |
 | SD card full! |
 | More (undisplayed) notifications |
 | Call in progress |
 | Missed call |
 | Call on hold |
 | Call forwarding is on |
 | Speakerphone is on |
 | Ringer is off (Silent mode) |
 | Ringer on vibrate only |
 | Phone on mute |
 | GPS is enabled and working |
 | Uploading/downloading |
 | Content downloaded |
 | Sign-in/sync error |
 | CDMA signal, roaming, no signal |
 | GPRS service connected, data flowing |
 | Edge service connected, data flowing |
 | 3G service connected, data flowing |
 | Wi-Fi service connected, network available |
 | Battery charge indicators: full, half-full, low, very low! |
 | Battery is charging |
 | Wireless services are off (Airplane mode) |
 | Bluetooth® is on, Bluetooth device connected |
