Slick has a couple pistol grips:
And Manfrotto has a side grip:
Bogen / Manfrotto 322RC2
And an interesting joystick like design:
Bogen / Manfrotto 3265
But most of the above have load bearing capacities comparable to ballheads in the $40 range. So you are sacrificing a bit of stability for the convenience. And it does matter how heavy your setup is. These are probably fine for lighter weight gear, but I don't think you see them on the heavier duty more professional equipment.