Your list under the Stairs link on the main menu is where you see the names that turn bold when you can challenge someone. (After clicking "show my stairs only")

I would like to see a little red number beside that "Stairs" link in the menu, that tells you how many of your stairs you currently can challenge someone in. And when you click the red number it takes you directly to that list of your own stairs.
That's my fantasy... Yes, I live a sad life.. LOL