Hi Rick,

> Any way to make the deformation "live", so I could manipulate the target curve
> and see the results in real time?

Yup, it's possible to do that using history. Do the Flow one time and make sure to not enable "Delete input objects". Then select the object and run Edit > History and click "Enable update" button. Now that history updates have been enabled on that object result, you can then edit the target curve and the deformed result will update as you move the target curve control points around.

- Michael