I just want to inform that I have released version 1.0 of my free .NET Connection Tool for MS Excel. The present version can create and store connection strings for all kind of databases. It can use the Data Link Wizard as well as the .NET based Wizard to create workable connections. New features will be added later on but it will not include all the new features that the upcoming .NET version of SQL Tester will have.
For more information please see: .NET Connection