SQL Bandwidth Meter is a unique tool for SQL Server 2000 bandwidth usage monitoring, counting and reporting.
What makes it unique? It provides a bandwidth control on per user basis. With this tool you can see the amount of data used (downloaded and uploaded) by each SQL Server user. Thus you can bill your customers for the SQL bandwidth usage or just find out which customers use your SQL server intensively.
Installation is straightforward and only takes a minute by entering IP address and port of your SQL server and clicking several buttons.
For more information, please read this document.