grondahl

@David: Personally I find that the stance with toes pointing outwards makes it very easy to get a full hip/center movement. It also makes me bend my knee a little more than hanmi so that it creates a deeper stance than hanmi and with the weight centered a bit more forward than hanmi.
So full hip movement, deeper stance and a bit forward creates a more stable and powerful stance than regular hanmi, but I find it harder to move from this compared to hanmi.

@David again: Check out the footwork of Nishio and his students (very forward, almost aggressive)

I think Tomita sensei still uses a similar stance (at least his back leg is still straight).