Comcast Bandwidth Meter helps you Monitor bandwidth usage. Did you know that your Comcast "Unlimited" Internet service is not really unlimited?
"As of October 1, 2008, data usage above 250 Gigabytes ("GB") per month per Comcast High-Speed Internet residential customer account is considered to be excessive" (details available on Comcast's website).
From personal experience I know it is important to monitor your Internet usage. Before I was aware of this cap, Comcast had shut of my connection for exceeding this limit.
With Comcast Bandwidth Meter, you can see exactly how much bandwidth you have used this month, and whether you are in danger of exceeding your cap. And because it queries Comcast's website directly, you can be sure the numbers are accurate.