Got this from CNET, so its legit.
Nice lil freeware app called 'Bitmeter', and it does exactly what the title suggests.
Very customisable, with scrolling graph that shows realtime traffic through your network adapter,
so you can see if you're getting what the ISP promised.
As I said, its freeware, no limitations on usage.
You can get it here:
http://codebox.no-ip.net/controller?page=bitmeter2Let me know what you think of this.
Enjoy.