Sometimes I'd like to extrude a profile between two points, without needing to harvest the dimensions from the sketches.
You can select a point for an extrusion when using a 'To' Extent, I would think it would work just as well to have that option when making a 'Between' selection.
Here's a simple Screencast. Obviously this is just to illustrate the concept, this feature wouldn't be necessary for a part this simple.