[mikeyur]

The business model that makes the most sense to me is to sell the solution to businesses. Companies that deal with a lot of databases and want an easy solution to do mass edits. They probably could have their IT guys write some crazy Excel macro to do a lot of this, but your product is so simple my mom could use it, which is a great thing.

You could keep it as a web service and/or charge to license it to businesses and make residual income off support/updates/installation on their network.

[jeroen]

It might be interesting to offer repeatability to businesses. Have them create an account and save their transformations. The challenge might be how to allow the editing of a transformation in the same simple UI.