You need to decide what technology you are going to use for the web site. Will you be using MS technology or something else?

Then you need to determine how you will handle security. Will you be using Windows authentication or SQL Server authentication? Will each user have a login or will there be a single login that the application uses to connect?

Do you want users to be able to write queries or do you want to provide them with a querying tool where they select tables and columns from a list?

You can look into Microsoft Web Data Administrator this was released with SQL 2000 I don't know if it will work with 2005/2008 although it does look like it has been moved to codeplex with a 2005 release[/url].