Rouded corners tool, where are you?

[Jonopen]

For interest here are screenshots of these type of tools being used in other apps to help visualise how they work.

I personally don't have much of a need for them nowadays, but in the past I would have found a corner tool a fantastic time saver for all sorts of things, especially technical drawings and diagrams. With all these kind of tools (and SmartShapes) it's important to be able to set a value (for example radius) for consistency.