Data Usage Monitor
Mobile Data Alerter is a free Software which monitors your daily / monthly data Usage on the Blackberry in 3 different categories.
1.) Local EDGE
That’s pretty helpful for those who have either subscription with limited monthly data usage or who are roaming.
You can download OTA (over the air) by entering the following address in your Blackberry Browser: http://mda.e-office.com
The developers website can be found right here.