I have found mainly 3 Web Based Enterprise Mangers:
1. ASP Enterprise Manager (http://www.aspenterprisemanager.com/
) is a web-based interface for Microsoft SQL Server and MSDE written using ASP.Net, VB.Net and C#.Net. This is free and open source SourceForge.net project. I have not heard good things about this product. Moreover, the development of this project is very very slow.
2. myLittleAdmin (http://www.mylittletools.net
) for SQL Server and MSDE is the most advanced and robust web-based MS SQL and MSDE database administration tool. It allows you to remotely manage all aspects of your server and databases. It has good reviews but the biggest problem the prices. Too high
3. WebSQL Console (http://www.websqlconsole.com
) is a specialised tool allowing especially the webhosting companies to move their services a significant step ahead. Actually, there is a very attractive offer to host the users' databases under Microsoft SQL Server 7.0/2000. Have good team working on this project. It is not costly as myLittleAdmin but it is not cheaper though.