...because non-graphical user interface questions like "how can I make my bank's phone service maze of options less homicide-inducing" belong on UX.SE
I reckon user-interface should point to GUI design. Let's also merge in any other UI/UX tags while we're at it, and add something like:
For questions about UI or UX design that are not related to designing graphics, please ask at http://ux.stackexchange.com
How do we make it happen?